Agreed. Tweak the ability. Don't cap it.

Okay, what's your suggestion for countering Maul?  Right now the only ways feasible, is casting Blindness (mostly from the Darkling Cloak, or being Empire with Death Disciple), or having very high dodge or armor, both of which is not feasible in the early game where bears are common, and make it really easy with high accuracy to smash everyone when you get a Maul weapon.  I get the feeling the reason people don't want to change Maul is that they want to regularly get 10 or more hits per attack when they get a maul weapon.  Maul is so powerful with high accuracy that one Maul weapon can decide combats against much more seemingly as powerful (or more powerful) foes.  This does seem OP.

So, what's your solution for Maul deciding combats against way more powerful enemies in the mid to late game?

A larger accuracy reduction for every hit is my solution. -4 accuracy worked in the old game when accuracy wasn't a rough percentage indicator. I would say minus 10 to 15 accuracy per hit now.

Totally in favour of a cap. 4 sounds feasible but scaling with monsterlevel is agreeable too.

I think a cap is reasonable, if you are assuming each turn represents a certain amount of time (though that's not consistent with moving once your guys can cover 6+ tiles in a turn), but some testers like the (slightly) unrealistic mechanic to represent the "open up a can of whoopass" type of move--that is a pure gamer joy/nightmare mechanic (vs being justifiable by realism).  Never mind that most old school (D&D) gamers are conditioned to appreciate the randomness that represents the complexities of life which cannot all be quantified.  This is why a Maul cap feels arbitrary/stifling, IMO: it becomes more predictable, less feared, and less able to be developed (though I doubt anyone is going to argue for keeping it as one of the main "I win" moves).

There is a little evidence in the game that the designers have toyed around with changing the per-hit penalty (I saw a -10 in one of the tooltips), and I believe that is the best compromise--it makes the attack less powerful in the early game while not killing its randomness or its ability to be built up.  It's not like you can buy a maul weapon from any vendor, which I consider to be a balance to its ferocity (and one of the few things that makes the beastmaster skill so viable in the early game).  Maybe the solution includes having several versions of Maul (including one that's a rare warrior training option).

Right now, maul is functionally super haste. If that is intended, then a limit on the number of attacks able to be executed doesn't make sense. If it is not intended, then there should be a finite limit to the number of attacks that can be performed. Perhaps that limit could be increased based on dexterity or something.

How is the maul ability underpowered

Sincerely
~ Kongdej

I would not be in favor of a hard cap.

I still think Maul is pretty easy to counter since Blind and Evade are pretty common spells and Maul already has a reducing capacity to hit.  Maul weapons also seem to be lower damage already but some other suggestions:

Item based immunity---such as spears, one handed clubs, shields.

Other side of the coin---let maul give the opponent the oppurtunity to counter attack regardless of weapon.  Successful hit stops the maul.

Swords---let swords counter for each successive hit of maul.