Originally Memory Seed's primary source was from buying FG packages. Outside of event freebies/reward or monthly shop resets, there was no way for players to obtain seeds to get memories. So it was the right move to allow them to be rollable by FG. Those packages also have increased amount of FG now if that's relevant to anyone.

We'll need to wait until the pity system shows up before making the judgement. Additionally, they mentioned premium gacha will also have 2% rate, so it might affect the premium gacha tickets as well. It might be wise to wait until next week's update kick in before using up your tickets.