I have noticed the issue of brightness with my personal CRF Pro unit. As others have said, the CRF Pro doesn't have an auto-brightness setting like previous Leica RFs. It gives you level 1-5 to choose from, and I have kept mine on 5 the entire time I've had it so that it's bright enough to see the readout in sunny conditions. It could probably afford to come with a 6th brightness level. However, that extra brightness might be too much during twilight, so it would be a potential trade-off.
If you point the unit up towards the sky or depending on the level of sunlight exposure where you are, the reticle will fade out to the point it can be hard to see. I too was concerned by this initially, but I haven't had this be a problem in any of the hunting conditions I've faced. This is between a bear hunt in ID in May and now a elk hunt in CO earlier this month; i.e. using the unit to measure targets found in nature. However, I could definitely see the dimming or fading out being a cause for concern for some users.
Also, other folks are correct on the button pressure. It is a little heavier than previous leica models, but I have gotten used to it. I'd say maybe 20% heavier if I had to guess. It hasn't been an issue for me to hold steady. I think the unit just fits my hand well enough that I can still be steady to my liking. That understandably won't be the case for everyone.
All other features of the rangefinder have been operating well thus far in all the conditions I've faced. I will say I haven't used the unit in prolonged field temperatures below freezing yet. It did spend a couple of nights in my freezer, and that went fine. Yardage readings have been consistent and reliable. Battery life has been very good as long as bluetooth isn't left on constantly. The unit isn't perfect, but I have enjoyed it enough that I have kept it and continued to use it as my "do it all" unit up to this point in 2024. A big part of the decision for me is the excellent glass in the leica units and how fine the reticle and number readout is, just a very clean look. I just really enjoy having an RF that I can take quick glances with and still enjoy a quality image (good brightness & FOV) that's true-to-color and doesn't give up much to my binos. Don't miss the days of blue tint and thick, starburst reticles at all. Also the new passport warranty they offer on sport optics is nice.
Those aspects make the other issues indicated palatable for me. As long as I don't have any major electronical failure or warranty issue, I see myself sticking with this unit for a while.