may I pitch in my opinion on RTW super unrealistic speeds? am I the only one to think it's not true? what exaclty is unrealistic with regards to RTW infantry movment speed?

I find it quite on par with real life given the time period and troop composition.
look at it this way. the heaviest units or RTW(urbans and phalanxes) are barelly more armed/armored than the lightest fully upgraded M2TW units like spear militia or levy spearmen/swordsmen.

the same goes for battles in RTW. some say it's over way too quickly.

I think it's slower than in M2TW for exaclty the same reason as in example with the movment speed. simply put your average medieval solder will have way more armor and protection than any roman era one. that actually means they should last longer even if they don't know how to fight...

so this is how I test it. I make a custom battle in RTW with best heavies they got to pit against each other(full armor upgrades/no experience) and do the same thin' in M2TW only this time I use the lightest fully upgraded infantry and pit 'em against each other. guess what? both battles will actually last for some time before it's all over.
alas, in RTW not all factions have great infantry and the unit rooster diversity is far greater as well...