Is Bloodborne worth getting back into with the advent of The Old Hunters?
I mean I've played pretty much everything in this vein since Demon's Souls and though I loved the Lovecraftian Cosmic Horror Bloodborne played upon I found PvP horribly unbalanced and some of the coolest weapons restricted to post NG.
That being said FROMSOFT usually does pretty good DLC (I'm choosing to selectively remember Artorias of the Abyss, Dark Souls) and a few more trick weapons wouldn't go amiss.
That being said I've not seen any new Arcane Tools or Attire on the Fextralife Wiki's so I'm kind of hesitant to pick it up.
So, let's see ...
The Old Hunters adds a goodly infusion of new content and new areas, including, for my money, the freakiest yet. It's a meaty expansion. It also contains what is, thus far, my favorite boss in the game. Lady Maria is just ... ah, she's a woman after my own heart. Not, you know, counting the horrifying experiments and all. But still.
There's new attire (I already have three complete new sets, and GOD I want Lady Maria's hat, which I can get once I beat her), new off-hand weapons (including a gatling gun-- don't expect your quicksilver bullet supply to keep in firing for long, though), new Caryll runes, new tools, and, of course, multiple new trick weapons.
PvP: unbalanced is in the eye of the beholder, here. Early on, PvP seems kind of ludicrous (especially compared to the Souls games) because of the difficulty of dealing heavy damage and the ready availability of healing. Since all armor in Bloodborne starts at its max level and most sets vary in focus, not overall quality, almost all hunters are running with powerful armor at essentially all levels. As a result, unless you've put some work into your weapon you can end up whittling at an opponent's health total with your Blades of Mercy as though he were a block of wood. It doesn't have to be that way, though.
It's not about which weapon; it's about how they're used and with what modifications. As in Dark Souls 1, matchmaking is on the basis of level, so there's a tendency for Vilebloods to stop leveling at either 100 or 120 (late NG or early NG+) and focus on farming high-end cursed blood gems (weapon mods, for the observers out there) from the chalice dungeons. I personally run a lvl 100 PvP bloodtinge build with high-end blood gems on a Lost Chikage, which reliably three-shots other hunters even using just the light attack (two hits bring most to the point where they can be finished off with a pistol shot).
As an invader, my health total is gimped and I'm always alone, but duels against opponents of any developed build are quick, vicious, and very much tests of skill. The invader's gimped HP doesn't count for much-- maybe one sword swing more or less, which can make the difference in a close match, but needn't. About the only trick weapon I don't much respect is the starting axe, which is just too slow to bring a quick player down.
Everything else can be made deadly. I'm well over a thousand kills in, and I still see people using old weapons in ways that make me blink and go, "What the hell was that?" That seems pretty reasonably balanced.
What I really prefer, though, is taking on pairs or trios of coop PvE players. Against a coop "gank squad," the gloves are off. I'll shamelessly use ambushes, environmental hazards, lead elixirs, you name it-- basically everything short of attacking when an opponent bows. That's too low, even for fighting outnumbered.
The balance in such a dynamic context is impossible to find. It's all in what resources you have, and how you use them. Long ago, I wrote a post criticizing DUST 514 for presenting a series of sporting matches rather than a war. Dark Souls and Bloodborne provide a war, albeit on a very small scale, and for that, I love them dearly.
(Best experience I've had to date: a seriously honorable player I invaded who directed his summoned assistants to duel me one by one, like I was a challenger at a dojo earning the right to face the master. I can't even remember who won; I barely care. It was just awesome.)