Got a Reinhardt, but...

The bane is perfect but the boon doesn't help you in any way. The only boon that is beneficial is +atk, everything else is irrelevant.

Nope.

He's basically neutral, but really attack is Reinhardt's only stat. You are missing out on 6 or more damage per combat, and Reinhardt is usually expected to engage in multiple combats and sweep the map. You want all the damage output you can get.

He's available as a 3*/4*, so shouldn't be too hard to get a +Atk/-Spd Rein. The one you pulled will work fine for now if you want to build him and use him, but keep your eyes open for a +Atk copy. When you get one, it is definitely worth promoting and merging into the +Atk one.