There is guild leve type of mechanic in every mmo , erasing guild leves to make dungeons leves is pretty much the same as making more dungeons and leave leves alone for that day you are extremely short on time.

Becouse the way guild leves are set now you can finish all of them in 30-min-1hish and get some decent SP FOR THE TIME SPENT.

Idk why soloers complain about leves now, they give a decent amount of sp in a extremely short spawn of time.
Are they boring and meaningless , well yea, but as any solo grind type of mechanic.Leves are completely aimed to solo currently.

Is like right after patch i logged in at 5 am did my leves cheking battle,got over half a rank and went to bed at 6ish , (yea i worked night shift that day).