i don't understand, you say 84 is too weak for him, yet you've given him 84 goalkeeping skill in your suggestions? what do you mean by that sentence?
and also, reina is a better goalkeeper then mignolet.
last season reina was rather poor, but it was due to his form rather then his true ability. i remember last season reina was rated 88 defence 90 res 86gks, so you can see their levels were similar last season. but reina is actually a better keeper regardless, and just suffered a poor season in comparison to his standards, which is why he received so much criticism.
It's my belief that goalkeepers playing in poor teams like sunderland was get overrated due to them getting overexposure of good saves (which aren't that amazing to me either, when i saw mignolet at sunderland), and very lenient judgement regarding mistakes. we've seen this season that mignolet is a pretty nice shot stopper, but two things in particular, that his reflexes are not exceptional, and he's very weak against crosses and with his handling. There were a couple of moments where if mignolet was really deserving of higher response then he already has, then he would have made a save, or prevented a goal, and yet he didn't. that is indicative enough for me.
unless something changes, mignolet developes, and shows some improvement in these areas, as indicated by future performances, theres nothing that a suggestion has any worth for.
If you don't put effort into your post, i won't put effort in my response.