You can play with 88 MT so long as you make everyone else play 88 too, otherwise you're better off using 89 non-MT

When is 0.90 scheduled ?

I did not have a single desync, and this is the first desync complaint I hear about 0.89, so unless you make a bug report there is a very big chance 0.90 will desync too. Specifically tell about widgets you are using.

np, I will post replay as soon as I retrieve them

Where should I put these exactly?
Adding movement = { useClassicGroundMoveType = true; }, in modrules.lua does nothing for me, same for the other one.
Using BA7.68 as the base.

Also FPS mode seems to not work - unit just slowly rotates on spot while doing nothing, can't shoot at anything either.

I have troubles with constructors every time I play on water (BA). I build many constructors to guard factory and they pushed to factory and factory don't produce because of pushed constructor ships into it.

Currently I can't provide a screenshot. But it's easy to reproduce. Just build 30 - 40 constructors, build a new factory and spam ships or air. Then set your builders to guard factory. Factory will build some units and stuck.

*snip*

Experienced the same.

Even after removing dragoon teeth units cannot go though where dt use to br . U need to individually micro step by srep every single unit So that work

TRUE!
+1!
Especially this issue reproducible for hovers. For example, on Small Supreme v2 enemy built teeth on the beach. And I reclaimed them using hovers but still can't attack this island because units don't want to go.

In this version, a lot of ground unit tend to go underwater and get stuck there. I guess that is cause of new pathing and it is kinda annoying to lose his unit like that. especially if you want to play micro, if you want C&C game tank spam ofc you dont care