I'll completely agree that the Musou series of games can be relatively repetitive, but saying that Zelda Musou is "
significantly LESS repetitive" is a pretty untrue statement in my eyes. HW does have the giant bosses which do provide quite a nice gameplay mix up from the norm of enemy massacre. Honestly the giant bosses are probably one of HW greatest strengths. There's no real equivalent in any other Musou game, except maybe Strikeforce but that was a spin off and had radically different gameplay. Also the weakpoint gauges are pretty unique, but aside from Zant, the strategy for exploiting them is the same on every enemy. Avoid an attack, go to town on them, and repeat. The different items are certainly a great addition and a nice homage to classic Zelda. And while the maps do have a bit more exploration to them, Dynasty Warriors 2-5 and 7 also had hidden health increase and musou up items in every stage, the key difference being that they could be found by anyone, and they could be collected every time you replayed the stage (which was the only way to max out your characters stats in older games). 6, 8, all the Samurai Warriors, and all the Warriors Orochi games work off EXP leveling systems. Getting back on track, let's talk characters. HW has 19 playable characters including DLC, which is less than even Dynasty Warriors 2 (which is the first real Musou game, since DW1 was a fighting game). Although several characters do have multiple weapons, so there's that to consider. However Dynasty Warriors 8's roster brought the count all the way up to 82. So Dynasty Warriors has had more characters than Hyrule Warriors consistently since 2 (except maybe 6, or as I like to call it, Attack of the Clones, but nobody talks about 6 anymore, it was garbage). My point being that more characters means more options and therefore less repetition. On top of that in 8 each character has 3 musou/special attacks. 7 and 8 introduced the weapon switch system where you could equip your warrior with 2 weapons that could be switched on the fly, which blew open the door for combo possibilities. Now on to stages. Hyrule Warriors is pretty lacking in stage number. Sure Adventure mode provides HUNDREDS of hours worth of content, but you are still playing the same stages over and over. And while yes that IS the mark of any Musou/Warriors game, most other games have plenty more stages, so again less repetition. Oh and Adventure Mode was based on 7's Ambition mode, which had a bigger map and, again, more stages. Now on to the matter of Level 3/Ultimate/Final weapons. In HW acquiring them always has the same conditions, get 1200+ kills, take less than X amount of damage, and complete the stage in under 15 minutes. In Dynasty Warriors, each characters weapons will have varied requirements based on the stage. Oh and they don't even TELL YOU WHICH STAGE THEY ARE ACQUIRED IN! At least until 7 onwards mercifully gave us that info with a small hint. In any case though it was more challenging, but also more fun to actually have to figure out what the hell you were supposed to do to get that super powerful weapon! Even in 7 onwards the hints they give are pretty vague, and at least in one case are just wrong! (SMH for Lu Xun's final weapon in DW8)
Wow that's a lot of text. My main point in all of this is that saying Hyrule Warriors is your favorite Musou game is perfectly fine. But saying that it's absolutely better than every other Musou game out there is just wrong. Not trying to call you out or anything Raz, I'm just something of a Musou Master! Oh and did I mention that Warriors Orochi 3 Ultimate has 145 characters in total, and you get to play as teams of 3 characters that can be switched on the fly? Just saying.
So this whole post might look like I'm ragging on Hyrule Warriors, but that's not the case at all. It's an awesome addition to the Musou spin off franchise, and I can't wait for more info on All-Stars for 3DS at E3 this year!