It's all in the title when you have 32 players and it's impossible to negotiate even with a swap.
Given that one player replaces the other, the squad remains at 32.
I know the subject has been vaguely broached but it's a positive improvement.
If I'm interested in a player on the market, I'd like to offer a sum + a player.
Or the other way round
I say if because at the moment there's no such negotiation but with 32 players there's not much we can do on the market.

An improvement in the same vision
Purchase of a high value player + free loan of one of our players.
In order to lower the price, we could include the loan of a big player in the negotiation.
Of course, this would be a loan of a player with the same minimum weight in terms of numbers.
So no young people for a possible disguised diversion.

I totally agree with you, it's a simple exchange, and we'd stay at 32 but the manipulation is impossible...

I suggested it several months ago, but nothing came of it.
I hope you'll have better luck