Which puts the Steelers in a quandry.
In the modern NFL the standard plan is to throw the presumed long term starter rookie QB into the deep end in his rookie season and see if he sinks or swims, while running an offense designed for his skill set in preseason. If the QB is not the answer you find out on his rookie contract and start again (usually with a new OC and sometimes new HC as well). Mahomes was not the starter until his second year but Andy Reid was highly confident he knew what he had (Mahomes had a great game in week 17 of 2017) and designed the 2018 offense around Mahomes after Alex Smith was traded.
Mason came in having to run an offense that needed to be redesigned on the fly, by an OC who is not exactly one of the great offensive minds of his generation, from what was assumed would be Ben doing pretty much what he wanted without AB to help make that sort of offense work. Assuming Ben comes back and plays at least one more season, the Steelers may have to decide whether to sign Rudolph to a new deal without him ever getting the bulk of reps in preseason in an offense designed for him rather than Ben or another season to start before his four year rookie deal expires.
Even if Ben struggles through 2020 and then packs it in, not having Rudolph locked to a new deal before the 2021 season runs the risk of Mason having a Dupree-like contract year and then being able to walk or force the Steelers into a bidding war.
Not the best scenario for deciding whether to lay out franchise QB $$ for someone.
Of course, as the linked article in
The Ringer discusses, it often is a crap shoot even with a first round QB choice who is given the keys to the cars from day one
How Do NFL Teams Know When a Young QB Is Worth Building Around?
[T]hree basic tests emerged that a quarterback should pass at some point during his first few professional seasons.
1. Is this is a player you can win because of, and not in spite of? ...
2. Do the player’s strengths outnumber his weaknesses?...
3. Has the player had enough opportunity—with proper scheme, coaching, and personnel—to show whether he is a QB you can consistently compete with? The exact time frame needed to answer this question differed among the folks I spoke with, but the ballpark seemed to be around 45 starts, or about three seasons’ worth ...
https://www.theringer.com/nfl/2019/1...chell-trubisky