Yeah pretty much, Infantry practically only has a purpose in sieges and are just walking arrow sponges on the fields.
I started this campaign as a roleplay foot army with some archers and little cav. And right now i have only archers and cav.
Becouse it was laways like this:
1. AI like a moron send cav and infantry in front
2. We cut them to pieces and now AI has tons of archers
3. We are going forward, they are going backward and constantly shooting
4. We are taking casualties, but pushing, then we start to cut the archers. And boom - 200 men just silently spawn behind my back, cut my archers to pieces, and charge to my back. And my reinforsments like a mile away.
I recorded some stats after another battle:
60 archers 288 kills 1 dead
15 cav 90 kills 0 dead
120 infantry 170 kills 50 dead (and it was almost all t5 troops)
So i just disbanded them and now i play with 50 50 cav archers and can beat army like 4 times more without any casualtes.
And i even can cut archers too, becouse they are toaly useless in sieges, I guess TW made them dumb as hell in siege atacks (so player cant just shoot all defenders like you can do it in warband)
Just command your archers to fall back and go cut enemy cavalry and archers. And after that may be you can go and kill runing infantry, but usually archers can deal with it ezpz witohut you.