firstly, was there contact or not? I can't say definitively either way. I don't think it's possible to say definitively from the reply, so all you have is the statements of the ref and Bennett.
Secondly, you can only get a retroactive suspension if there's a unanimous view by the FA panel. This requires clear/overwhelming evidence (often through clear TV footage).
I'm not sure that's the case here, but the replay that we've also seen shows that there wasn't any attempt by Bennett to trip or foul the striker. So to me that's enough to tear up the straight red card, but not enough to prove that it was a dive. When I look at the reply a see some light contact and therefore to me it'd be harsh to issue Jultkiewicz with a ban. If it was the other way around we'd be up in arms if this was Callum Lang and he ended up getting a ban and we felt there'd be a little bit of contact.