So a few days ago a pach was instaled and now some of the animations have noticeable slowdown and speedup, its only with spell affects in and out of combat and large army size.

Is just bugging be because it was not a problem before.

Any help would be appreiatied Thanks.

Patch?
You mean Galaxy did download this one labelled 1.0.0.1?
http://www.gogdb.org/product/1207663713
Since it is still not available for GOG version (offline) and only GOG-Galaxy, wrong labelled, there is already issues for GOG version for all 14 years and there is still missing content in recent GOG-Galaxy version, that probably beta update. Although it is not label as beta and should be automatically downlaoded.

Did you install this 'from 0' or update installed game?
There is more issues. Starnge not needed files:
autoupdinst.exe never be such exe - it is ProgramFiles\SF\AutoUpdate.exe separate app which one not needed at all, and no need to put this exe to game folder, there is not-needed unwise.exe...

And most important - there is GOG own DXWrapper in 2019 year builds of Dis2 and Dis2ROTE. Mobile Windows (8+) will NOT properly work with game without wrapping of old DirectX or tweaks. there is multiple ways, GOG wrappers fix it, but now it is missing from ROTE (Discipels2 still be 2019 and still have it).
This slowdowns without FPS issues happen in any game windows and circumstances if you play on Windows 8+. Also AI turn take much longer.
Revert back to 2019 version (more ingame content will be missing), or install Discipels2 and take ddraw.ini+dll\dxcfg.exe from Dis2, or use 3rd party wrappers (wined3d, narzoul ddraw, degevoodoo2 and many-many else).

UPD:
They remove previous build
http://content-system.gog.com/products/1207663713/os/windows/builds?generation=2
another point it is suppsoed to be beta and who did that mess up with it... but previous build deleted (not even hide).