yeah that's the thing and why I wish some quests were adjusted to match the content the account is running. Stuff like "craft perception/resilience" is another waste. I haven't even gotten into Clan Quests and how, for some reason after so much time has passed since Hard Dungeons were implemented, that ALL of the "X on Stage 20 Normal or Higher" does NOT count Hard Mode as being a "higher" stage number...
if anything, attempting to bring the quests in line with what the account is doing (or at least what plarium thinks the account should be doing) seems like it would increase the timesuck, not decrease it. the campaign battles are awful and a huge waste of energy, but all the other 'redundant' quests are dead easy and take all of about 30 seconds to deal with each day. i can't think of anything to replace them that wouldn't require a) more time, b) more resources, or c) both.
take the two quests you suggested in your original post. as you noted, both are essentially the same thing as the quests they'd be replacing, minus the ability to do a couple 10 second runs on stage one if you're really pressed for time.