I've played a couple of games while participating in playtesting
Fantasy Rules TCE (a very cut-down and better edited version of the older bloated version 3 rules).  It gives a more fantasy & fun feel to magic then HoTT seems to; plays with the same individual elements in small numbers, on a 3'x4' board, but allows them to get demoralised instead of just pushed back in mild defeats.  Nice and fast game, but I need more games to judge the balance.  Also suffers a bit for being a based on the older rules, but that should mean that the balance is pretty good.  Get an idea of the mechanics from
FR Annex(based on FRv2 but basics are almost the same).
Main trouble with Warmaster is that the standard armies probably won't fit the available 6mm models.  Also I thought the heavy cavalry were far too good for their points.
I read that HoTT has some short but too condensed (hard to make sense of) rules, which also put me off.