Worgozez have a slow replenishment rate in the mercenary pool, being 1337 and all that. Look for them in your starting province or in Scandinavia.
As a side note, I've dropped generals in Germania during my Casse, KH, Makedonia, and Pahlava campaigns just to hire these guys and use them as a fancy garrison for my capital or as an exotic addition to some elite army.
The pikemen are "only" a top tier unit, not a reform unit. The reform units are these:
Regarding, AI, it's retarded and it's hardcoded, so the EB team couldn't fix it (changing hardcoded stuff is illegal).
Either install the FD submod or just wipe out 'em bastards. Unless the Aedui field too many elite units at once (and be careful, their elite infantry units are godlike), you should not experience big problems with them. Your line units are more disciplined and courageous than theirs. Try to trigger mass routs via shock and fear, as you did against the Eleutheroi.
The scripted (and respawning!) Alpine elite armies are only there to stop the Roman or other AI factions from blitzing too much. You can auto_win them away if you want. Or do it like me and lure them away while you have your spies open the gates of their city and take it in the same turn.