Opinions on recent pvz 3

I feel like this game so far (for me) is 3.5/5 because it's fusion mechanic (someone is running out of ideas) and plants you can get without microtransactions finally, but I wish I could unlock all the plants after beating a certain level the first 2 games instead of seed packets, the Zen Garden is small as hell, it can be so much bigger (that's what she said), and why hearts? And why only five? IF IT'S NOT BROKE, DONT TRY TO FIX IT, that's what Popcap and EA should take from this, you can add new stuff but don't change something that was as fine as it was. Also 5 seed slots is too low, we need more seed slots and a good way to obtain more seed slots.