You almost sold me on how good he is by reporting 2 versions of his completion %
Over the past 3 years he's started 31 games. That's just over 10 per season, which you might balk at because he only started 2 in 2017, but it is right on his average for his career. 80 starts, 8 years. His completion % in those 31 starts is 68.6%, which is good. His YPA is 7.08, which is alright (It's lower than Tyrod who some people believe is a checkdown artist). He's accounted for 42 TDs in those 31 games, or 1.355 per game (Tyrod is at 1.477 over the same span). He's accounted for 27 turnovers, which makes his TD/TO rate 1.56, not 3 to 1 as you claim (Tyrod's at a 3.25 and he's scoring more per game). His TD% is 3.38% and his TO% is 2.17%. His ANY/A is actually nearly identical to Tyrod's over those 3 years at 6.23 to 6.25 respectively.
If you really want to switch to a guy who accounts for more yards, less scoring, and more turnovers that's fine, but he's no more than a bridge.