While i mostly like how the team has balanced combat in the M2TW engine, i have issues with units outperforming others by a mile, while others units are nearly useless.
Units that i´ve noticed underperforming are mainly persian, like the iranian javelinmen/spear-archers/arachosian cavalry/slingers/medium cav. All those are way worse than their hellenic equivalents (even toxotai are better for being cheaper). Some are just too expensive like the hellenistic phalangitai, with +2 armor and +1 morale over the light phalanx, but costs nearly the double - the description talks about not having the same esprit de corps but phalangitai have only 1 point more of morale, they should have at least "normal" morale instead of "low".
Units that i think are overperforming are clearly the greek hippeis (the description doesn´t match in the slightest what this unit can do), almost all thrakian units (specially peltanai) with their ap melee weapons and elite javelins - outperforming elite units that cost way more, post-reform roman units (maybe this was intended, still they´re way too good imo), etc.
I also don´t understand why some units have a near-identical copy that takes exactly the same role. The most glaring case is the western/eastern iranian archer-spearmen, but there is also the thessalian/lydian cavalry, or some post-reform roman units like veterans. All agema phalanxes got merged into one unit, as did the cavalry of the diadochi, so i think there should be a revision of which units can be combined.
Another big issue is how there is a hardcoded bonus/penalty for spears when facing cavalry or infantry. The use of swords or spears as a secondary weapon for many units, has a noticeable effect on their perfomance, like spear cavalry having a big advantage agaisnt other cav, while still being decent vs infantry (the charge is still relevant). This makes sword cavalry units a lot less desirable, when spear cavs does the same and also is anti-cav.
Infantry with spears are at a disadvantage versus infantry swordmen, so they´re more specialized agaisnt cavalry and suffer versus infantry in settings like settlement battles - where flanking is not always possible. Are these hardcoded penalties taken in account when creating unit stats? If you design an assault unit like the hyspapistai but arm then with spears then it´s a gimped unit, specially with the agema peltastai right there too.
Feel free to also leave your feedback about units that you think aren´t capable enough or perfom too well for what they represent.