Decrease Quality

[t11_fan]

Please can you advise is this good for cup for next season?/??

It is your decision. If you really want to sell someone, then I wouldn't sell more than this DC-DMC (which is on auction) and your 5* MC from 1st squad. But that means you need to buy someone before 1st cup match.
I've reached 1/2 finals of the cup in this and in last season with almost 6* avQ squads without decreasing avQ before season start.
I think your squad shouldn't have problems next season, it is stronger than mine. I have had plenty of scouts, but I didn't have 7* player(s).

Btw. my abandonned Celtic team with half-reserve line-up and some weird formation won the cup few seasons ago. After I restarted playing with that team, I couldn't believe they won the cup without me and without the best players in 1st squad.
So you can never know with the cup. Good luck in next season.