Grand Floridian has been under construction since 2019 when the walking path construction started. There has been ample warning on both the cash and DVC website notifying guests of possible disturbances. The transportation thing to me is a moot point because GF and CR are equidistant from MK and TTC, just in reverse. It's easier to get to Epcot from CR, but a trek to return. Vice versa with GF. Some prefer the GF walking path because it's scenic over the water rather than across an active roadway. To me, the walking path to Poly from GF trumps the boat to WL/FW from CR after 3pm. I prefer 'Ohana, Tambu Lounge, Trader Sam's, etc to WL/FW. GF is also the second stop on Poly/GF busses. CR is the second stop on WL/CR busses.
The outer building construction and scaffolding on the exterior of the main building actually seemed like it was a lot more intrusive than the current lobby setup. Sure it's not ideal, but outside of check-in/bell services you don't need to always sit in the construction zone. You have Narccoossee's outside, Gasparailla outside, and GF Cafe + 1900 Park Fare isolated in the corner of the lobby accessible to all the outer buildings. CL could take the secret elevator and walk under the covered walkway and completely miss the construction walls and covered staircase in the main building.
Comparing to CR again, the main building elevators are horrible at CR, especially when CG is open. Sure losing one at GF is hard for CL, but CR is not perfect and I almost prefer the garden wing at times because that elevator is crazy, especially if you have a stroller or assistive device and can't utilize the escalators.
Last but not least, this is the main reason I would choose GF over CR:
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It's sad, but CR rooms are now glorified AoA Little Mermaid rooms. I personally don't want Edna Mode or pig snouts on the TV wall glaring at me for 1k+ per night. Guests are still visiting GF and booking GF. You yourself mentioned you would even visit GF while under construction for amenities like dining which happens to be in the lobby or accessible via the lobby for non-resort guests so it can't be that off putting.