Thelin has stuck rigidly to a 4-2-3-1 system since arriving in Scotland last summer, except for one famous exception.
The Swede switched to a 5-3-2 for the Scottish Cup final against Celtic, succesfully stymying Brendan Rodgers’ side before triumphing on penalties.
There has been absolutely no sign Thelin is thinking of going with that formation again, but could it help?
Having another striker to support Kevin Nisbet might spark their stilted attack into life, because they have scored the fewest goals of any side to have played in the Premiership this season and last.
Given Aberdeen’s recruitment of wingers and their importance to Thelin, 4-4-2 might be a more likely option to change it up.
Or even just playing a more traditional 4-3-3 to get more midfielders further forward and reduce the reliance on a number 10.
Former Aberdeen captain Willie Miller, though, feels it is unlikely Thelin will mix things up in that way.
“That [formation] is his identity,” he said on BBC Scotland’s Sportsound.
“What he needs to do, and I think what he will do, is stick with it and try to get the right personnel in there. I don’t tink he has [got the right personnel].
“A lot of these players are young project players. They should have the energy, and he is hoping he has the quality but we’re not seeing it yet.”