Regarding changing you asset allocation, do it in way that eliminates/minimizes taxes. Do it inside an IRA/401k, or just new money or have dividends and internal capital gains paid out rather than reinvested. Or if you have anything in taxable accounts that currently have a capital lose, sell 'em now.
With regards to your house, I would aim to either slow down and ride that low percentage rate out as long as possible OR aim to have it paid off by ER. Having it paid off facilitates ACA (and similar) subsidies because of low income.
With regard to you actual question regarding asset allocation, plan what your income needs and sources will be for the first 5 years of ER. What dividends/internal capital gains does your current allocation generate? Do you have rental properties or other investments that pay out cash? Any pensions, part-time jobs or similar that'll generate cash.a At one point (when interest rates were higher) I had zero coupon muni bond ladder with one maturing each year. If you plan to do a Roth conversion pipeline, remember the first 5 years you'll need *double* income (and maybe taxes): what you need to spend for that year, plus a similar amount to convert for 5 years later.