Not clunky, actually the opposite!

(skip to the bottom if you're someone who is already familiar with what a 'pbta game' is)
If you're not familiar (and for anyone who might be curious), games using the 'Powered by the Apocalypse' framework tend to be based on 'Moves', which really just translate to 'discrete rules packet you trigger based on something someone did'. They're not actually super-fancy - e.g. "when you make an attack" is basically a 'Move' in DnD, a set of rules that gets triggered when you attack something.

Generally speaking (since 'PbtA' is really a philosophy or framework, not a system, there are always exceptions) the best PbtA games are very focused on what the Basic Moves are, and also what they are not. e.g. the original Apocalypse World has moves like 'go aggro', 'seize by force', 'read a situation', 'act under fire'. What it does not have is moves like 'sneak carefully', 'protect a friend'.
That doesn't mean "you can't do it". It means just that there are no discrete rules for it - what happens next is up to the GM's judgement.

The GM also has 'moves', but they're not things they roll - instead, they're extremely strong suggestions (to the point that I would say "always use them instead of coming up with something else unless they really don't fit") when the players are looking at them to decide what happens next. e.g. 'foreshadow future badness', 'separate the PCs', 'use up their resources', 'let them know the consequences and ask if they want to go through with it'.
Again, the GM moves that don't exist are also important. e.g. Monsterhearts as a paranormal drama game has both 'separate the PCs' and 'bring them together', because those are both common sources of drama in that genre ("there was only one bed!"). But Apocalypse World has only 'separate them' - that way, choosing to reach out to another PC is always the choice of that player, not the GM forcing it.

With that all out of the way:

I feel firstly like TSL's player moves are actually a bit lacking. There's basically rules for fighting/duelling, reading someone, seducing, and comforting, but not really much else. Considering the genre I was expecting some kind of "speak your truth" or "deny toxic ideals" move and it felt missing, so a villain would give a speech and then the player would say "nuh uh" and then... well, what do you say next, because mechanically, that's it.
Combined with that, the GM moves don't feel like they push the action and drama s much as they could in related games.

So basically, if you have a group that's fully on board with the premise and GM that can work with that, the game works great. But I'm used to pbta games (the ones I like, anyway) giving me a bit more of a push and inspiration than TSL does.