There are a lot of hoplites and spearmen in strat battles lately, but I don't think there's anything that should or would need to be done about it. They are able to do relatively well against a more standard enemy infantry (1h/shield, 2h's and a few pikes/spears), and are able to consistently keep enemy cavalry from doing large damage to their flanks. But at the end of the day, these hoplite armies are losing the 1 on 1 battle against the more standard infantry formations.
It's all adaptation, and I think it's excellent to see. Being cavalry it is certainly frustrating having 10 of your cavalry try to dodge and weave into the enemy infantry flanks only to get skewered mercilessly, but I enjoy seeing armies adapt (just like IRL) and trying different strategies and tactics for success.
Anyone who complains about the enemy doing something logical (using pokey things to stop horses) can suck my dick, and this is coming from a fellow dedicated cavalry player. Stop crying, and adapt to the hoplites (as they have done for cavalry).
Crying on the forums about legitimate tactics and classes needs to stop, and the dev's need to stop listening to these fucks.