Using WRs at TE isn't an exploit to me!!
We have no ability to create, modify or design plays so when you select a play that uses 113 personal (RB/TE/3 WR) and you put a WR at TE then the play simply becomes a 14 personal play which obviously exist.
We only have a handful of plays that actually work and we have to put the best personal at the right position to get the best results because Defensively our opponent is putting his best cover corner on the TE. If you use a legit TE at TE and the defense puts his best CB on that TE then we are typically talking about a 10 speed difference plus the DB has 50ish pounds less in weight which further extents the speed difference.
The term "exploit" really bothers me because I see it as a legal move countered by another legal move. That's what this sim is all about...finding the advantage against your opponent.
Originally, I joined MFN for the roster management aspects of MFN, drafting, signing free agents, trading and managing the cap. Initially, I had a blast and built what I thought at the time were great rosters but I often finished 5-11 and there were owners I could never beat. Then I slowly realized the default player weights weren't optimal and when he created my own custom player weights, I realized I had drafted, signed and traded for some horrible players which meant rebuilding all my rosters over the next few seasons. I started to win more but there was still owners I couldn't beat. So I really started to dig into gameplanning and play calling and I got alot better and went to the postseason but still there were owners I couldn't beat.
Then I started to use overrides to optimize my plays after learning that certain positions were targeted more in the passing game and I adjusted on offense and defense and I finally beat those owners I never could before and won some Titles.
The greatness of MFN is the many layers you dive into and you can always fund ways to improve you roster and gameplan. It's a Neverending series of moves and counters and calling anything an "exploit" is really a lazy way of saying "I can't compete" and it pushes an owners failures to win into some weird realm of ethical or moral superiority because my opponent isn't playing the right way.
I've said this before and I will say this again....I would love the Sim to force players to play "at weight" for the position they are playing but until it does then I have to put my best players in the best positions to succeed because I can only assume my opponent will do the same.
As far as the TE position is concerned....every TE generated in the draft class including a "perfect" TE who has 100s across the board and 88 speed.....will ALWAYS be better converted to either RB or WR....ALWAYS!!!
The example of the perfect TE above at 257 lbs will be a near 95 speed RB or WR with 100s across the board so unless you have a primary blocking TE on the roster, there is no reason to have anyone remain a TE on the roster. That's just the truth as the Sim is currently.