I feel like the lengthening of holes just makes more holes feel similar. When a short four becomes 350+, it's pretty much a drive and short-iron for everyone, as opposed to a hole that might have choices.
For years my club has seen its tip number at 6450 as a weakness, but I have continually advocated to leave things be. For one, we are a par 70, so our par 72 equivalent yardage is 6700-6800. Also, the couple holes that have been talked about to lengthen would take a narrow 370 hole where each member has a theory on the correct tee club to a 410 mindless driver for all, and take a great short par five of 500 to 540, which would remove the go/no-go decision on the second shot for 99% of players.