Electrical for Whole House Remodel
There is so much wrong here it's hard to know where to start and I don't have much time tonight. So here are my initial comments:

Separate your lighting circuits from your outlets, you don't want to be in the dark if a breaker trips.  On that sized house, with LED lighting you could easily run the lighting for entire house on 2 15 amp circuits (probably one, but I'm being cautious), if not LED lighting...why not? It's a game changer.

Your supply to the base board heaters is way over kill, a 1,000 watt heater at 240 will draw just over 4 amps. A 20 amp 240v circuit can supply 3,840 watts including derating for a continuous load (240 x 20 x .8 = 3,840 watts). Lots of your heaters could be combined into fewer circuits.

In some jurisdictions, depending upon which NEC code. Dining areas (dining room, kitchen nooks, etc.) need to be on a separate circuit from other living areas.   I think that's a stupid rule, but it is what it is.

Stay away from MWBCs (what you called 3-wire) for your kitchen and appliances.  They are a total PITA when it comes to GFCI/AFCI protection.  Given current wire pricing, you don't save anything by going with 12/3 vs 2 x 12/2.

Bathrooms require a dedicated 20 amp circuit, but that doesn't mean EACH bathroom has to have it's own circuit, that circuit can be shared by multiple bathrooms, that's up to you. I do prefer for each bathroom to have it's own circuit, but that's not required by code.


I'll think more about this and probably add to this tomorrow.