I played it, and my opinion stands. there is nothing here that wasn't already done better in the previous two games.
I played some more, and disagree.... at bare minimum the graphic style is different and as much as I loved Battleheart (BH), I like this 2.5D style as well.
The game is also on the one hand more simple (no gear, no xp/levels, no additional classes, 1 less character), but also much more difficult, and requires more strategic thought (which skills to bring) and, for either better or worse, more grinding to upgrade skills. One subtlety to keep in mind is that whatever skill you bring also adds a passive bonus or 2, so that can be an important factor later on. I did some grinding in BH as well, but that was mainly to level a particular character or 2. BH had a lot more throw away levels and relatively fewer bosses with special abilities. Raid Leader every battle (except Arena) has been a "boss" and has had a different/unique aspect to it. Also the one Arena was a very different experience.... your guys are bombarded by poison and slugs, so you have to move them around to keep them alive while tapping on slugs to kill them and gold to get more gold. It's much more hectic and challenging in a different sort of way. I end up just focusing on keeping one person alive as long as possible; I'm thinking with better healer upgrades I could last a lot longer.
If you were only going to choose between the two games, I'd whole-heartedly recommend Battleheart, but if you loved BH gameplay and played it to death, I'd say this one (particularly at $0.99) still offers a fun alternative to this growing genre.