Hang on, all three were involved in the campaign that took us to the sem-final, only a few weeks ago. Admittedly, all of them were poor for (sometimes long) stretches but clearly not everything they touched turned to dog-poo, either - or we wouldn't have won a cup, finished top four and reached that semi (however poorly we performed v Real).
People (not just you) should try to relax and enjoy the down-season. We have absolutely no control over who City sell or sign. There's no point in overthinking the whys, wherefores and what ifs because you only wind up jumping to silly conclusions (such as the example above).
Don't get me wrong, I like the transfer forum too and it's always exciting to think that we may be acquiring some top class players but that doesn't necessarily mean that those we already have are totally unfit for purpose, either.
If we sign some more, great. If we don't, not so great but they'll still give it a go (however far short they fall - or not) and we'll keep on supporting them (rather than taking a defeatist attitude before a ball has been kicked).