Let's suppose the game was bugless and worked (HAHAH) ...Hey I love this game so forgive the irony please - and start talking about its strategic faults:

It's just full of exploits of all sort!

For example:

One of the sovreign I created has the ability intimidate. Well In 90% of battles the enemies are scared shitless (even elementals) and they just stand there waiting to be killed, dopn't move, don't even react when attacked. I even won the last battle like that, the one related to the forge that brings one of the victory goals)

Familiars: they are the strongest units in the game and so easy to have relatively soon in the game and in large number if you have a wizard with a lot of essence. Just imbue a bunch of guys with essence, each one of them can have a minion, make an army of those guys and be certain that each of them (when their stack attacks) can make 20 hit points of damage on turn one before the enemy even breaths. no parameters are considered they just make that damage to ANYONE!! No enemy will survive turn one of your battles. The world should be ruled by familiars, not dragons or knights!

other exploits anyone?