This ride is not even close to reaching it's life span mechanically. It could continue to operate until well into the 2030s and I imagine DW intend to do that. It's too expensive to replace at this time.
Right now, DW need to focus on getting Rivertown right, finishing Ocean Parade, Dreamland, and getting the Wave Swinger open and give visitors a full day of entertainment with high quality experiences.
But I've been pretty vocal about the theme and placement of Motocoaster. I think everyone agrees it is an eyesore. Bright green and yellow were a terrible choice.
Short term, I'd repaint the track to a darker charcoal colour and remove those colours from the station. It's a relatively cheap aesthetic fix.
Long term, I'd get some spinning trains, re-theme the entire thing to fit Rivertown with some sort of expedition adventure narrative. I'd also focus on building structures within the ride footprint to cover up the big plastic water tanks.
It will last another decade if DW want it to. They just need to make it fit better into the Rivertown area.