My FM is not loaded up at the moment, but there are four berths across the AM line, aren't there? Same as everywhere else, I think. I liked the Asymmetric 4-5-1 in FM11 and I wonder whether an asymmetric version of 4-2-3-1 might help to get the right balance:
GK_Defend
RB_Support
CD_Stopper
CD_Defend
LB_Attack
DM_Defend in the DM line, left of centre (ideally left-footed)
DLP_Support in the M(C) line, right of centre
W(R)_Attack
AP_Attack in the AM line, left of centre
W(L)_Support
CF_Support
The key is to understand the crucial relationships within the team and how those two or three players link together; which players should be looking to play one-twos? Who should be crossing the ball... and where from and where to? Who's going to be on the end of those crosses? When we counter, who is running where and how (and how quickly) are we getting the ball to the furthest man forward? Who and where are his options?... etc, etc. When you decide the answers to these questions (by watching real teams play live and on TV, and by watching FM matches on the Comprehensive View), you can use the PPMs and the Individual Player Instructions to get them to do what you want. My currently injury-hit Blackpool in League Two, still in FM16, might not be the most fertile testing ground but I might bear it in mind and see whether I can get some joy out of it when I have some better players.
To any decent FMer who also holds a season ticket at the club of your choice, I recommend sitting high in the stand where you can see all of the off-the-ball movement. A lot of my FM tactical thinking is based on the Southampton side of Lambert, Lallana, Schneiderlin and Shaw that I used to watch, four rows from the back of the Kingsland Stand at St. Mary's.