Tbh, I think my favorite part of this update so far is the 4h exp boosters (which are decently common drop from red gifts from what I can tell) and the fact that story nodes give full exp when replayed, and if the char you're leveling ever runs out of energy you can just toss em an energy refill and keep going if you feel like it's worth it.
I was waiting for a good time to evolve my Harle to diamond after I got all the stuff for it last week, and hoo boy... I evolved her today since the Filia pf is great for leveling, popped a booster, and over the course of around 3 hours I got her to lvl 25. Kinda ridiculous, but I'm not complaining lol. I probably could've leveled her even higher, but 3 hours is a lot of grinding. Power leveling is so much easier now.
Edit: Also wondering about a hidden gift drop cap though, since I don't think I got any drops at all during the last hour or so.
Edit 2: Actually, I think the 'cap' might be when you have 50 total gifts to give?
Edit 3: Yep, gifts stop dropping when you have 50 total gifts to give. Didn't get any for several hours when I had 2g + 48r, but then made a new friend, sent them a gift, and immediately got a gold drop from the next match.