Thoughts on Summon Charge

My thoughts after the Summon Charge system was implemented. I don't know if others feel the same, but I don't really like how when I do a 10-pull, the rate-up character appears around the 7th draw, leaving me with 93 more pulls until the next pity. Realistically, in terms of cumulative rewards, pulling in 10-unit increments might be the most efficient, but it still feels like a waste. Also, during the times when 3-star rates are doubled, I honestly haven't been able to make good use of them.