And who's comparing 2016 MG to 2017 Tolbert? Oh that's right, nobody but you in yet another attempt to reframe the topic to appear right.
The option for Bills wasn't a street free agent Gillislee vs another option, it was paying Gillislee $4 million this year. Genius Bill thought he was getting a 5+ yd a carry RB with that investment, and instead he got a pedestrian back who's very good exploiting wide open holes. For half the investment and more production he should have kept Blount.
BTW, Tolbert does not have a 100% failure rate on 4th down conversions this year (unlike MG). In that regard, Tolbert hasn't failed yet.