Does your bike have an engine?
What mileage did you get out of them?
I've been using TKC70 (and Rocks, once) on my GS for quite a few years now as I find it to be an extremely good "do a bit of everything" tyre.
From memory, they manage to cover a decent amount of miles (definitely >5k miles, that is a lot for me) in acceptable shape.
The Rocks rear tyre would last significantly less than the standard 70, as expected.
Few years ago I bought some 70 Rocks before traveling to Italy as I was expecting to do slightly more gravel than my usual.
Ended up not doing a meter offroad and the entire trip was tarmac-based.
New before leaving London:
and after coming back:
This is the track from that trip and total distance covered (picture to picture

) of 5687km:
The standard 70 rear would generally last a decent more than that as well.
I wouldn't complain to be fair (standard TKC70 >6/7000km). I also expect squaring off on my way back to London. Inevitable on the last leg.
These are current standard 70s I have on my bike now.
Photo taken on my way back to London, this summer. This at the hotel the evening before going up via del sale and then progress towards Dijon and then London.
I think similar distance covered in km at that stage (around 5k). Slight squaring off as I did a couple of fair stretches of motorway in Italy (way down and back up) to save time to meet friends.
My main issue with the 70is is front could be a bit more communicative and cupping over time (even though the bike setup is to blame for that 99%).