action feels great it is smooth tight and glassy, seems like all they did with the tenacity was offer less options and streamline the manufacturing process to cut the price. That was perfect for me as I didn't need or want the options and the simple action body worked well for a hunting style rifle look. I have never had a deviant but I would imagine it's comparable. Actions are hard to describe and the feel can be subjective but I like it for sure.
As for bolt handle, i was also bummed at first. I could have had it turned down but tried a slightly higher ring first and I liked the result, I have no issue with the current ring height it still may be too low to fit a 50+ mm objective scope. ARC extra lows are extremely low, I'm not sure I've seen any in the wild on a rifle before. The rings on it now are still lower than any NightForce makes, and way lower than ARC lows. Better fitting is not always as low as you can go IMO it's when it shoulders correctly and you can practically do it in your sleep. Had this ring height been too high I would have had the handle modified, Alex didn't seem concerned about it being difficult at all. That said, I hope they do offer the smaller diameter handles they mentioned to me especially for people who want to skip the 20 moa base and mount a small scope low to the receiver. It would further improve what I think is probably the best deal on the market for actions.