So, for those not in the know, these buffed rates are actually a huge nerf due to how pulls work.
Old Rates: 5% Character/0.5% Banner Character (10% Ratio)
New Rates: 7.5% Character/0.5% Banner Character (6.66% Ratio)
This not only makes it unnecessarily harder to get Banner Characters without Pity, defeating the whole point of buffing Banner Rates to begin with, but further discourages pulling without a guaranteed Pity, which takes months to get from 0 if, say, you know an Epic/Relic you may want is eventually going to be a thing and want to plan ahead, but there's also things going on in the current moment you want. It ends up making pulling for things you want for fun not ideal and as mentioned, discourages it due to nerfed ratios.
To keep the original 10% Ratio, fix the Character Rates to 0.75% Banner Character. I'm not asking for anything unreasonable like 1% or 1.5% but rather enough to keep the original feel of the rates intact and make the buffed rates feel like an actual buff.