Do it! A 17g isn't too bad in terms of rescaping plus its nice to see a freshly planted tank fill in again.
I agree with you before I do I want to grow out some plants to put in the new scape. But I definitely will, I want a lower maintenance scape for next time. Everything I have in my tank is annoyingly high maintenance so I have learned from that mistake. Stems cannot be just trimmed back at the top or they branch and look ugly,(Rotalas, Pogostemon Erectus). MC needs to be trimmed biweekly I need to learn to cut it much lower and just accept it might be yellow for a week or two after.
Growing plants is no problem but aquascaping is a learned skill combined with a talent for it which you have.
I'll try out the scraping method next waterchange, i've got a spare toothbrush I can use.
Sometimes a toothbrush isn't enough, you might need a steel brush,it will get off a lot of green algae but BBA is stubborn.
The H202 method is a tried and true though, give it a try.
Well I most only get it on dead things like my wood or stems in poor health, overall I have had so little I could scrape it off. Agreed if I had large epiphytes I'd have to consider using H2O2 it as replacing a Buce would be costly.
As long as you don't overdose, a couple sprays leave the algae turning red
The coolest way I learned from George Farmer, lower the water below the plant or hardscape with BBA area and paint with H2O2 using a paint brush let it sit 10 minutes and then you can refill, WCs help as well. Probably the safest way to save the plant from damage if done carefully.