I know I'm far away to be a great statsmaker but at least there is always the general idea of wich attribute are the best for the player.
However I do think Dalbert set is more accurate than Mendy's was. If you want to have a look there are some vs video available of him last season:https://www.youtube.com/watch?v=eyo-SwivClchttps://www.youtube.com/watch?v=ohP3vRgitHwhttps://www.youtube.com/watch?v=8LFCMEyF8pQ
I know you are more conservative with defence but I think 73 is deserve in the way he's great at run back and tackle. The low TW represent well the fact that he could be less efficient at team tactic in defense. I mean he's great at one and one, but higher TW will make him also great as a team defenders while not on one vs one.
About attack, he's not very good in his decisions making, but he's very dangerous and creates a lof of goals opportunities. That's the reason he's at 70. I guess you'll speak of may be reduce it later. That's why I explain the reason behind it.
His turn or dribble could looks poor but I see he's good times to times for feint, run around, etc... for me it's more a problem of weak feet. He doesn't look like a low agi. He's able to quickly turn his body if needed, but he doesn't use the right feet except for simple back passes so that's the reason his agi kept good and left feet very low.
His passes are terrible anyway, really poor I feel (or is it just because of his bad decisions making). To resume him I'll say he has amazing physical skills, fast as hell. Decent for ball control or dribble but not great. Great fighting spirit, and a really great tackler on ground.
So here my last tought to explain the reason behind values on this set, it could help you to rate the set better if you see weak rating, it's now in your hands. Sad to see him moved he was one of the best left back, great loose for Nice.