Everyone has different desires and needs when it comes to cameras. A good photographer will definitely take better photographs than me even with much older equipment but there again put me behind the wheel of the latest sports car and stick Hamilton or Verstappen in 1.1 Aygo I'll give them a run for their money.
The change in technology in cameras is astounding over the last 15 years. When it comes to Canon, the leap forward with mirrorless cameras is by far the biggest leap I have experienced, particularly the R5. They threw everything in to that model, they had to to catch up with Sony however, what you have never had you won't miss. I imagine that the jump from a 7D to a 7D2 is very pleasing indeed and that's all that matters. It's an excellent camera, especially at the price you can buy one for nowadays. Enjoy it!
I'd echo this.
Regarding the step between 7D and 7DII I'd relate my experience of the transition.
I bought my 7D in early 2011 and I was happy with it, but its noise performance left something to be desired. I was booked for my first trip to Goa in January 2015 and in the months before that, with an eye to the number of photos I would be taking in poor light, early daybreak, forest canopy etc, the new impending 7DII caught my eye with its advertised improved focusing and noise performance. I bit the bullet and pre-ordered one, taking delivery on the first day of issue, 30th October 2014.
I was happy with the Mk II, happier than I had been with the Mk I. Although the improved noise wasn't quite the improvement that I'd hoped, the autofocus was miles better. However, like many others with a new camera body to get used to I suspect, I was too busy learning the ropes on the new body to really absorb how much of an improvement it was.
That all changed only a few months later, when at the end of June 2015 the shutter failed completely in the new body. Away it went to be repaired under warranty (it still works) and in the meantime I got my trusty old 7D out of the cupboard. What a shock it was. Chalk and cheese. Going back temporarily to the Mk I body was like taking a step back in time. By now I was used to the 7DII and no longer new-fangled with it. The improvements over the 7D were as plain as day.