This is the first time I've had fun with pokemon in a while. Mainly because the fusion mechanic allows you to create some unbalanced Frankenstein's monster ass abominations that God Game Freak would never allow to walk the earth. For one, you can now give abilities like Magic Guard, Levitate, Speed Boost, Wonder Guard, Compound Eyes, Huge Power, etc, to anything your heart desires. Coming up with the most busted combinations I could think of finally lets me put the immense amount of information on pokemon stats rotting in the corner of my brain to good use. The first few hours of my playthrough consisted of me frantically catching everything I could find, just on the off chance that they might serve as complimentary in a fusion.
I don't usually have a big interest in pokemon fangames, so I don't have a real point of comparison outside of the mainline games, but there are some good quality of life additions as well as some new features that make it enjoyable to play. And yeah, it is somewhat buggy and lacking a bit in polish. However as it is still regularly receiving updates I imagine that it will continue to improve in that department as time goes on.