While I get your point, I want to disagree with the severity here.
Getting Persuasion in 5e is really not hard. Its not a big cost. Oh I'm a noble instead of a solider....done. Just that simple. Backgrounds are mainly about skills, so if you want a skill, take a background that has it. Done. Skills are pretty easy if you want a specific one, its just hard if you want a LOT of skills.
Choosing one manuever to be really good at something is not a huge investment. Maneuvers can be spammed, there is nothing that stops a BM fighter from just using say.... Parry and Precision attack all day every day and be perfectly, wonderful fine in combat. If you want to take the last maneuver for a persuasion bump....your really not reducing your combat effectiveness all that much.