Depends on the quests. Some give you rep, some don't. Hemet Nesingwary for example would be a waste of time for Valarjar reputation. In the same way not all quests in Suramar give that rep. It's a little annoying but I mostly just do all the quests for the gold anyway and to be thorough.
The campaign will get you to honored-ish, then do world quests and the bonus when available. Revered shouldn't take terribly long. Align it with things like the 10% rep buff from the darkmoon faire or the weekend event for rep gains if it's that awful for you and you're patient.