I must confess that I'm conflicted about this.
On one hand, I would never want Indy to be portrayed through an impression, as opposed to acting.
On the other, if Ingruber proves to have proper acting chops (and that is a big if), why not give him a chance?
The physical likeness to Ford is remarkable.
Also, he's the perfect age.
If Indy 6 were released in 2022 or 23, Ingruber would be 32 or 33 and could play Indy in the early 1930s, before TOD in the timeline.
The ball is your court, Anthony: show you can act, and who knows what may happen?