There's so much bad logic in here it's painful.
"We have the same 1st 11." - Except it's weaker, it's older, a bunch of key players have had shorter offseasons. Weaker in what way? Losing Yaya? Sane is 22 now and Sterling 23, yeah, age is a problem. Every two years they have shorter pre-seasons, what's new?
"Add Mahrez remove Yaya and we are better." - That's not how it works. You can't just keep removing defensive midfielders for wingers and pretend you're better. Yaya just took up a spot, Mahrez isn't a straight swap obviously but he gives us another option up front. Looks like an improvement to me.