Something definitely needs improving as far as fluidity goes on those aspects of the game and one thing that i'd like to see to kind of change that,is to allow strikes in all of those spots,that cost almost no stamina,are really fast,deal very little damage and especially allow transition blocking while striking.
I don't know how something like that would be limited by having an animation for a punch not allowing the animation for a transition block,but a good example is at the half-guard postured down,when you throwin small punches to the opponenet's face,it allows him,almost always to transition and put you back in full guard,despite hiting the block transition button.
So 1 my recommendations to make it a bit more fluid, is basicaly to allow some strikes,to be really fast,not cause stun reactions,while also allowing to block a transition.
As of now,most of those spots seem pretty stale and boring,as everyone keeps waiting for the opponent's transition attempt or strike,in order to block it,instead of throwing a couple of strikes to make it a bit more intresting while waiting for those transitions.
Also another thing that i'd like added to the game,but will most likely not happen in this one,is to allow strikes in the submission game.This would definitely make it a lot more intresting and could combine concepts like "Strike to make your submission tighter by making the gate appear faster." or "block the strike,to make your escape gates move faster." etc.
Like Anderson's silva Submission:
https://www.youtube.com/watch?v=aHBbQk1S83Q
All in all,i believe one great aspect that could improve the fluidity and break the monotony in the clinch ground game,is to allow small/quick strikes that don't affect the transition blocking and dont really cause damage,but rather affect the grappling advantage and perhaps as an annoyance that they are supposed to be,cause your opponent's stamina recovery to pause for a few ms.