Sorry, I don't have yet the HR34/H25. What do you mean by edit/adjust recording? Whatever the problem is, it can be fixed with software update not new hardware.
From an H25.. you can hit the record button, and the HR34 will record what you told it.. but you cannot change the recording options (for new/repeats), nor delete the upcoming recording (if you hit the record key on the wrong item, or no longer want to record a series).. in fact you can't even see a list of what will be recorded from the H25.
and yes, I'm sure it COULD get fixed in SW... and yet the HR34 has been out for how many months, and there's no indication of this even yet being in the CE's. Having spent several years with Dish, I can only assume it will be added to the SW "soon" (as, in when he11 freezes over)
As someone who most certainly doesn't need 7 tuners (1 HR34 + 2xH25), I would happily trade for these new clients if they offered trick-play. I really do miss having that on all TVs. (I fed TV2 on my Dish 622 to several locations). 3 tuners (on a Hopper) is more than enough for our viewing habits.