I'm not sure how you are using the word exploit, so il share the definition with you.
To "Exploit" is to make use of meanly or unfairly for one's own advantage.
If you are using video game definition it's.
"In video games, an exploit is the use of a bug or glitches, game system, rates, hit boxes, speed or level design etc. By a player to their advantage in a manner not intended by the game's designers."
The entire game is one big exploit if your using your verbage in this manner. And I feel your using the word in a way to be manipulative. Now....
As to "Exploit" in ESO is to use tactical observations / Thoerycraft you butt off, to gain an advantage over other opponents. Obviously by using bugged, broken, or OP abilities/sets that nobody has thoerycrafyed yet. Well @Ackwalan my answer is again no, its not an exploit.