Not at all, 30lb Fireline is about the same diameter as 15lbs mono.
I usually use 2.75 or 3lb test curve rods for live and deadbaiting with it. I don't think braid casts quite as well because there's more friction in the rings from the rough surface but that's a minor gripe and I'm sure some would say they get further with it because of its lower dia.
Until you get used to it every fish feels like a big double because you really do feel every lunge and head shake without the stretch to absorb it. Fish react more violently to being hooked - I think because until you get used to braid you tend to hit them too hard and knock smaller fish off balance.
I don't usually bother using the drag, except netting fish when I'm on my own. I usually backwind.
The only thing you have to watch is snagging up. You can straighten most hooks out of snags with 30lb line, which obviously cuts down on lost lures anmd baited rigs thethered to snags.
But don't bend the rod, point it straight at the snag. If you have to pull hard, you can damage the spindle on the reel or strip gears, so wrap the line around a pair of forceps, back stick etc and pull with that.