Without so much batting an eye on the things they've added in place. Bloodborne has trick weapons,
Is taking any two Souls weapons, cutting half the moveset from each and then slapping them together an addition, though?
The faster dodging and the rally mechanics are there to further reinforce this, you're forced to change the usual approach used for Dark Souls. Whereas previously you have the option to wear heavy armor, tanking attacks with poise (Dark Souls 1), hide behind a shield to poke once in a while if there's an opening, you're now forced to rely solely on (step)dodging attacks, and be as aggressive as you possibly can.
This is blatantly untrue. Bloodborne, like any of its predecessors, can easily be played defensively. Stay out of enemy range, let them exhaust their canned combos and punish. This is arguably the easiest way to damage enemy limbs where applicable, since whiffed attacks usually leave breakable (for lack of a better descriptor) parts wide open.
But Bloodborne's faster dodging and the rally mechanic means you can prolong the offensive without backing off even once, provided you have the skill for it.
Bear in mind that rallying isn't applied equally across all weapons. Heavier or blunt weapons (say, hunter axe or tonitrus) make the most use of it, while others only have a meager gain. For 2/3 of the games weapons, you're typically better off taking the Souls approach, back off and pop a blood vial.
What the fuck am I reading.
The truth.
Other than streamlining the RPG mechanics by cutting it down to only 6 attributes, the game mostly changes in moment-to-moment combat gameplay dynamic due to the things I've said above.
Besides attributes being cut down, equipment burden, poise and, as a corollary, poise damage, stability (remember, in DS it's a stat for weapons as well as shields), curable, but otherwise "permanent" debuffs, off-hand movesets and powerstancing were all removed. I like Miyazaki as much as anyone, but let's not pretend he isn't Japan's answer to Todd Howard.
I don't get the impression that Bloodborne is harder or easier compared to Dark Souls 1, only that it's now a different game which kept some of the formula still the same.
Right, and this middle ground that Bloodborne occupies is exactly the problem. It's too streamlined compared to Souls, but too simplistic compared to Ninja Gaiden or DMC.
If by fewer methods of attack you mean there's only the trick weapons, guns and its variants, and hunter tools (pseudo-spell items like the Augur of Ebrietas), minus pyromancy, magic, miracles, uhhhh should we argue whether or not pyromancy, magic, and miracles fits the setting?
I don't care in the least what fits the setting. My favorite game of all time is Shadow Hearts, which takes place on the cusp of the first world war and yet features hitting people with books as a viable combat tactic.
What other dedicated action games has anything remotely similar to the trick weapons?
DMC has had on the fly weapon swapping since 2003. Shit, CoD has on the fly weapon swapping.
If there's any, does any of them has anything that could rival how Fromsoft designed the gameworld and levels, and pulled off the narrative of Bloodborne?
No, no action game could ever compete with "play 2/3 of the level to find the shortcut back to the checkpoint". To date, I've never played a pure action game that's pulled off a narrative like Bloodborne and I'm eternally grateful for that.
Dude, did you even play the game?
Three times, unfortunately. It took me a long time to overcome my buyers remorse and accept the game's shortcomings.
And if those things don't excite you at all, have you seen THIS:
"I don't think this game has enough variety."
"Oh yeah, well have you seen people spamming the same things over and over again? Bet you feel foolish."