Worth changing from 2006 Time ATAC Carbon XS and Shimano SH-M121G to modern SPD-L pedals and shoes?

N0bodyOfTheGoat
N0bodyOfTheGoat Posts: 5,845
edited August 2018 in Road buying advice
Thinking about making use of sales to change to more modern, lighter and bigger contact surface area gear. Current shoes are beginning to show their age, Time pedals still work fine, could put them both to use on the Voodoo for a while longer.

But for the Cube, would I noticeably benefit from spending ~£175 on a something like a pair of RC7 shoes and Ultegra PD-R8000 SPD-SL pedals?
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2020 Voodoo Marasa
2017 Cube Attain GTC Pro Disc 2016
2016 Voodoo Wazoo