It's because collagen re-modelling is bullshit. Dermapen, lasers, needling, none of that works, it's all marketing spin and pseudo science.
For acne scars that may be true. That's why I try to emphasize that people need to combine several modalities for the possibility of long term results. That said, it's important to find a physician that truly cares for you and sympathizes not for what's in your pocket. It's also important to do extensive research first hand before you opt for a certain treatment plan.
Myself for example in no specific order -
3 Vbeam @ practice
Various Tca/Salicylic @ home
Various Microneedling @ home
1 Subcision @ practice w/ suction @ home protocol
Anyways, OP I suggest you take a look at my detailed Subcision/Microneedling thread found here & check out my journey along with detailed Clincal papers/studies as well as real before & afters of acne.org users that have inspired me to go the subcision route. And quit paying for microneedling, buy yourself a device such as the Derminator for $200 and do your own treatments in the comfort of our home, you'll end up saving $1000's!
3 weeks after Subcision Update - 90-95% of scars still appear to be gone. My temple scarring as well most if not all of my cheek scarring is basically non existent except for a few that were in odd places to be able to perform suction correctly, but the improvement is phenomenal at this point. Lots of places on my face feel somewhat hard to the touch, NON nodule like and they are not visible at all. I am assuming that is scar tissue taking place. Sorta seems like a layer of scar tissue or new tissue was laid down over the pits I'll give it one or two more weeks to report final results, no not really, 'According to patients and investigators, subcision plus suction showed 81% and 65% improvement after 3 month, respectively' & 'Assessment and grouping. Two investigators and the patients rated improvement of scars using percentage after completion of treatment in two stages: 2 and 6 months'
Vbeam is perfectly safe. If it's the 2nd generation Vbeam 'Perfecta' you wont be left with bruising but your face will be swollen for a couple of days. You wont see results for 2-3 weeks. Also it's important to note that depending on your situation, you'll need 2-5 rounds, 3 rounds is ideal. It's not a one and done kind of laser.
As for the dryness I don't know. I'm sure someone will be able to comment on that