The 7mmRM is probably one of the finest all around cartridges we have. If a shooter can't handle the recoil, that has little to do with the cartridge and more to do with the rifle and a persons sensitivity that any particular cartridge IMO.
People say the same thing about the 300 magnum and yet people continue to hunt with them with great success. As far as getting one of the "new" 7mm's instead of the classic, what do they offer that the 7mmRM doesn't already deliver?
There is a reason the "other" 7mm's are dying off. 7mm WSM? 7mm Weatherby? 280 AI? 7 SAUM? 7mm RUM? Did I miss some?
They all fall to the 7mmRM. The 280AI is the only one that is even a contender and that is very limited in ammo and gun availability and doesn't even match the 7mmRM.
Whether or not a 7mmRM is NEEDED is for the shooter to decide, but don't dismiss it simply because it's not the flavor of the week.
As far as being a barrel burner, you'll never know it in a hunting rifle. If you plan to shoot long strings of fire and get the barrel smoking hot then sure, you'll burn it up eventually but so will many other calibers too.
Sorry if that's ranty, I've shot the 7mmRM since I was 11 years old and never even knew it had a lot of recoil till somebody told me.