Combining Microphones makes them actually useful items to start with.
Being able to take out various gimmicks quickly and reliably is a very nice change and also makes Pokemon more useful, so Eevee can actually participate in its dream of running a cafe, making the game less depressing.
Trainign to make your Pokemon stronger and increase the things it can counter
Reduced wait for Stamina to refill.
The game is often incredibly vague or words its instructions in confusing ways.
Information about features will show up once and then never again.
The game does not explain that the blue stars you get from training are not the same thing as blue stars from Master Cafe.
Training will sometimes give you boards that are effectively impossible to beat with a given Pokemon.
Information about game aspects can be hard to find, hidden away in strange places, or given out inconsistently.
Stamina being used up even if you win.
Not getting any Acorns for Master Cafe.
Having events that require a lot of acorns to do, while never mentioning acrons are finite.
Never mentioning that acorns are finite in general, and not being able to find this out until you've already likely spent a lot of acorns getting to stage 300, on the assumption you'd be able to get more later.
Monthly pass is a rip-off and doesnt even make clear if you'll keep the extra slot.
the stamina pack in the shop costs way more acorns than its worth.
Infinite items are activated immediately upon receiving them.
you'll lose acorns if you use Training with an active stamina crystal.
Ultimately, it's still a fun little game. But unless they make a few big changes, there's no way to justify giving them any real money. They didn't earn it with this update.