Lol, I know what you mean. Those legendary spheres say like 80-90% but it feels like a coin flip most of the time. I have had so many fail at like 95%.
The gameplay is very good up until level 40 and is definitely one of the more complete early access games.
So far I have not encountered any game breaking bugs, but the game itself does have tons of jank.
Now I am currently level 47, and can say that leveling from 40 to 50 is a hella grind and takes a lot of time and resources. Mainly time, as getting end game pokeballs takes a massive amount of resources that only pals can harvest, process, and then craft.
Also, the end game bosses are quite beefy and hit like a truck.