@ Stealthblade...
I don't know about it being overpowered.
After playing my Stealth/Sneak guy, I played a Iron Fist guy with that fist weapon from the named at the pond. He 1 hits everything more often than my Sneak/Stealth guy. Yes my Sniper/Stealth guy seems to 1 shot 90% of the time. But my Iron fist guy doesn't need to sneak up on anything. I added the VATS Blitz perk and he just teleports on top of everything and 1 shots them without taking a hit. My stealth guy usually 1 shots everything, but if my companion gives me away or for some reason they see me I have to unload a 40 round clip from my combat shotgun modded to be a sniper rifle to kill things that are my level (108). The perk that loses their agro if you pop out and back into stealth never seems to work properly for me. My fist weapon guy didn't even wear power armor. I then played a Power Armor guy with Heavy weapons. Just as over powered. He didn't 1 shot, but he never really was in danger of being hurt either. There is a Pyromanic build (that's all chems for 40+ seconds of slowing). They may take shots, but nothing seems to really challenge them.
On youtube you can see like 50 builds that are just as powerful or more powerful than the sniper build. So nerfing the sniper builds seems a waste of time. As there are many other things that need much more serious attention .
After the patch I saw my guy getting x4 percent. Still enough to 1 shot most things. It still seems based on you losing the stealth bonus if you 1 shot hit. Before the patch it often only showed me hitting for 3.5 x damage. I have that Vats Combat Shotgun modded out to be a sniper, with lots of rounds and quickload. It is probably not even close to the hardest hitting sniper. It hits for 149 a shot (x4 if the stealth mod applies). It also has 40 rounds if I get caught "flat footed". So I don't need to carry another weapon. Though I usually carry a melee weapon that uses that Slugger perk. And I use the Vats Blitz perk when I use that. Again it and my sniper 1 shot Death Claws on the old survival level. In the new survival mode I would probably be in big trouble. Considering all the bugs Bethesda has to work on, I find this to be odd.
I do have the two perks they were saying were having an issue though. And I think it was bugged and never properly registered both. Thus the 3.5 I always saw. Now I see x4. In the old Patch I think I sometimes saw it say x5.3 for the damage bonus. I don't know if that is what needed to be patched. Probably, if that was the case.
Stealth in Fallout 4 is like Skyrim. At first you thin it is over powered, until you play another build and find it is average or under powered compared to others .