So i'm around level 38 now and my playstyle is one that uses heavy weapons (missile launcher is my favourite) and i also use melee weapons when i'm in close range.
The problem is that now i've almost maxed out both of the damage modifiers the weapons are so overpowered. I'm also at a level where i can buy around 10 missiles from most merchants so i'm never short of ammo.
As the weapons are overpowered i can easily take out virtually anything, without taking a scratch. I've put the difficulty higher now and it still seems too easy to blow everything up and one hit enemies with my supersledge (not saying this isn't satisfying). I love Fallout and i love the freedom it gives you to be anyone you want but i don't know whether to carry on or to start a whole new game.
I think i want to try a different build, but i feel like i've come too far in this playthrough to stop. I was wondering if anyone has shifted playstyles at this point and what is the best way to do this. I could either pile the next 5 perks i get into perception (now thinking VATs rifle build) or should i just go buy the weapons i need mod them out and give up all my current weapons cold turkey.
I would love to hear the playstyles people transitioned from and how they did it to keep the game fresh. Thanks

Given your advancement changing your combat style while not being ridiculously OP for a bit will still be OP just because of how far you've come. If you want to really test a new combat style starting another guy is the way to go. I say that as a 175 that's gathered all the damage perks over time as well as bonuses and vats perks and I'm just an ass kicking mess 
And ya don't have to start over. I wouldn't dream of starting a new character but I also really really enjoy face rolling every enemy in my path with whatever method I feel like. And I like being filthy filthy rich. Ah the life of a water baron.