I'm a Reacher fan, of the books anyway. Don't like this current guy, way too big and like you say not a great actor. I always thought Brad Thorn looked the perfect Reacher lolI checked out the TV series yesterday.
I find it hard to adapt from the minds eye of the written word to the Screen.
Tom Cruise as Jack Reacher is obviously ridiculous given he is meant to be towering over people.
I found the TV show a bit hard going with the lead actor being a bit one dimensional, physically obviously is a lot closer to Childs Reacher, but he is a bit too Gym bunny for my liking and not a strong actor.
It would be very difficult to find the right specimen for that role, I always pictured Reacher as more tall wiry hard kinda Norse like no gym weights type.
More of a Sean Bean than an Arnold.
The books are really easy to get into. That is always a sign of good writing imo rather than being easy because they are simplistic.