We are a one-income household.
Debt: $317k left on 30 year, 3.50% fixed rate mortgage
Tax Filing Status: Married Filing Jointly
Tax Rate: 22% Federal, 4.95% State
State of Residence: IL
Age: Both 34
Desired Asset allocation: 80% stocks / 20% bonds
Desired International allocation: 30% of stocks
Total portfolio: $763k, excluding $26k in savings for short-term savings goals. Can also double as emergency fund.
Approximately broken down as follows:
$390k tax-deferred
$140k tax-free/Roth
$205k taxable
$28k 529 plan
Current retirement assets
Taxable
15.2% Vanguard Total Stock Index (VTSAX) (0.04%)
11.7% Vanguard FTSE All-World ex US Index (VFWAX) (0.11%)
His 401k
9.9% Vanguard 500 Index (0.05%)
Company match 2%
I am a highly-compensated employee and our plan does not pass nondiscrimination tests. Therefore, I receive a refund of my contribution each year. Last year it was approximately $8k, which I then invested in my taxable account.
His Roth IRA at Vanguard
8.4% Vanguard Total Stock Index (VTSAX) (0.04%)
5.2% Vanguard Total International Stock Index (VTIAX) (0.11%)
His Rollover IRA at Vanguard
5.9% Vanguard Total Stock Index (VTSAX) (0.04%)
21.6% Vanguard Total Bond Index (VBTLX) (0.05%)
Her Traditional IRA at Vanguard
12.7% Vanguard Total Stock Index (VTSAX) (0.04%) <---Rollover IRA from previous job
0.9% Vanguard Total International Stock Index (VTIAX) (0.11%) <---just started funding Traditional IRA after my wife quit her job to stay at home with our daughter. It is deductible.
Her Roth IRA at Vanguard
4.8% Vanguard Total International Stock Index (VTIAX) (0.11%) <---no longer funding after wife quit her job to stay home with our daughter; funding Traditional IRA instead for tax deduction.
Illinois BrightStart 529 Plan
3.8% Index Age Based Moderate 0-2 (0.12% ER) <---this is 60% U.S. equities, 30% international equities, 10% bonds, using all Vanguard index funds
Contributions
New annual Contributions
$14k his 401k ($19k plus $3k company match, less $8k refund due to nondiscrimination testing)
$6k her Traditional IRA
$6k his Roth IRA
$11.5k taxable investments for retirement
$2.4k 529 plan
No bonds being purchased currently because we have about a 78/22 split now and a desired 80/20. It will take a few years of contributions as listed above in order to get back to 80/20. The reason is that we had cash on hand for a couple of big purchases that are now complete. I could rebalance, but I am more comfortable doing it with new contributions. I'm happy buying equities until we're at 80/20.
Funds available in his 401(k), excluding everything with a 0.75% ER or higher:
Vanguard 500 Index (0.05% ER)
Vanguard Small Cap Index (0.08% ER)
Vanguard Mid Cap Index (0.08% ER)
Vanguard Intermediate Term Bond Index (0.07% ER)
The plan itself charges a 1.05% annual fee in addition to the expense ratios of the individual funds.

Questions:
1. Does it make sense that we are using a Traditional IRA (it is deductible) for my wife's contribution instead of a Roth? The logic is that I am unable to max my 401k due to the nondiscrimination testing refund, we have a large taxable account and Roth accounts already, and we will have no pensions in retirement. Therefore, a significant portion of our retirement income will not be taxable and we therefore would currently like to invest as much as we can in tax-deferred accounts.
2. We have both international and domestic equities in all three account types (tax-deferred, tax-free, and taxable). We have U.S. heavily in tax-deferred and international heavily in tax-free. Is it worth exchanging in both account types to get a more even balance, or should I not care? Is there any reason I should spend any time caring about the split of domestic and international in the three account types, or is the logic that both domestic and international equities are tax-efficient and suitable/appropriate/good choices for all account types?
3. Another poster said that Roth conversions are worth it when the market is down because you benefit from future growth tax-free. This very well could work, but it seems like an attempt at market timing to me. What is the Boglehead consensus on this, if any?
4. When I do start adding more bonds, what's the best, most efficient, simplest way to do so? Use the intermediate term index in my 401k, or continue to use Total Bond in traditional IRA, which would require exchanges within the account every so often? The latter would keep me with the same number of funds as now and would keep bond in Total Bond instead of Intermediate Term Bond Index. Are the two basically considered interchangeable, sort of like Total Market and 500 Index?
5. Given that I cannot even contribute the full amount and my employer match is only 2%, along with 1.09% total expense ratio, is it possibly worth entertaining the idea of not even contributing and going full taxable instead? I think a strong no, but wanted to pose the question.