FWIW I don't think distance covered is a good metric to use for pressing.
It's a good metric for sheer running about aka distance covered, but there's a difference between that and pressing effectively.
I'd like to think the only attributes that would majorly effect distance covered would be stamina, work rate and the tactical set up (which I'm presuming you did change but for whatever reasons, maybe faulty from the ME, hasn't had a major change) also let's remember the stats aren't that reliable that FM produces.
Lastly, I guess it's always important to remember that a rating of 1 for an attribute is a 1 for a professional footballer. So still far beyond any of us mere mortals!
If a player with 1 for passing and long shots when compared with a player with 20 for both was consistently performing on a par at the same standard... Sure an issue. If they are able and do occasionally do good passing or score worldies? Not an issue imo. I've even seen Andy Booth round a keeper one in real life and he was just a head on a stick!