Need Opinions

I need some opinions, my 2010 Escape 2.5L is leaking fluid at axle/transmission seals on both right and left sides. Should I get the rebuild kit for both sides or just an OEM new shaft seal and shaft sleeve will suffice? I know the rebuild kit comes with the updated shaft design but I just need the car to last 3-4 more years. Anyone who did only the seals, did the old axle cause it to start leaking again?

Doing the rebuild kit will cost about $200 extra labour. If I do get the rebuild kit, do I need both sides or just the driver (since driver side has known flaw design)?

Thanks