The idea for your bro' is that don't have to see the ratings, the value of a player is in what he contributes.
I think that he need to sell 1 or 2 defenders and buy a new DC for sure. Sell the worst subs' and prove the new DC in right side.
Too can buy a new MC that maybe help in defense in more %.

About the 4-3-3 is what I always played when I started, the typical formation of my team, now I use a 4-3-1-2, the AMC is a MC or a ST.
attacking mentality, always zonal, mixed passing because I think to left/right/centre etc is so specific in every match, and 2 blue arrows for the DC's and 8 red arrows.
Training points/cones always added to phisicall skills 1st till the player have 9 stars of speed.
And thats aprox. how went me good LOL