Like you suggest it all depends on end use and engineering demands, we will sometimes inject even a timber system that looks out of place, so it will never be confused with original framing.
In your average utility barn I'm typically for doing the least visible and out of place looking repair that the owners budget will support, To at least try to keep it looking like it always has.
Sounds like a heavy steel strap over the of the tie, though the mortise and down the back of the post might be one way to go. But the bending issue would then return, how far is the drop ?
Introduction of a canted purlin post plate system to redirect much of the thrust directly to the tie and away from the wall plate might look and be appropriate, both now and originally...
There are umpteen approaches that can be taken.
But this isn't really forum fodder and isn't something to be conjecturalized about without much more information.
