It’s best that you revert the old borderlands for now since it’s not certain that your idea of “fix” is the same as other peoples’. The newer maps look nice, but there’s a verticality to them that discourages fighting and makes basic movement a chore. Even the stairs inside of the new keeps seem out of place, and they only serve to make arbitrary chokes every other turn. Also, the placement of towers need to matter. If a tower has no real strategic placement then it discourages the capturing, defending, and overall usage of it. This also kinda leads into the lack of defense of keeps which are now auto-waypointed, but that’s that an argument for another time.
In short…buffing the npcs and swapping back to the old maps would be an easy “fix”, BUT you would also need to revert the supply costs of catas to retain the balance the older maps had. I really doubt that wvw players would be sad to see the old maps come back until the new ones are retouched. The new maps don’t need a total remake, but a rebalance of the layout, world events, npc mobs, and structural defense buffs seems kind of inevitable.