Job restrictions due to how the job is already naively designed, It Just makes sense for a Thief to sub Ninja or Dancer pre DW buff. It was a massive increase in DPS and even now both of those subs are used in different situations, /war is not exclusively used By thieves in all situations.

Beastmaster is in the same situation that Thief was previously in. It's locked into certain subjobs.

Pre 99 I used /whm quite frequently leveling the job. It wasn't something I particularly enjoyed, but the end justified the means, I had to stay alive, sneak/invisible charm monsters, the whole solo thing.

/mage isn't something I've taken seriously since /dancer came out. With a combination of a great Regen set, PDT/MDT set, well timed Snarls and intelligent gaming you don't need /mage unless you need a long lasting snk/inv for bumming around old content to do someones COP/TOAU/WOTG missions where /rdm or /whm is good enough.
I would certainly look at /whm again If the job was offered any good Scythes, entirely because of how Entropy operates Being an Apocalypse Drk I'm not wasting merits on the WS with my intent to make some kind of weird bst/whm Scythe melee. Which wouldn't work anyways because then If I was out to DD with a Scythe Id want to sub Samurai for Hasso not to mention I'm just throwing away my A- Axe skill and Guttler for a gimp scythe and B- Scythe skill.. In which case Bst/Whm is just another form of bst/dnc with worse attack/accuracy, haste spell, bad cure4's erase and RR...(off track here)

90% of the time you're on /dnc, it's a good combination of what whm used to give in regards to survivability and what Ninja offers in DD.
The only thing Ninja sub offers to a Bst is a single Tier of Dual Wield(10% respectively). This effectively makes this subjob our "DD sub" That's all this sub offers us. Utsusemi certainly helps mitigate some damage. But this is by no means anything comparable to what /dnc gives us. You sub Ninja with the intent you have someone backing you up in the healing department, which means you also at least have haste.

So far I shouldn't have said anything none of you already knew, but I thought to clarify, first off, my thoughts on the matter.

Now then. Explain to me why giving Bst Native Dual wield 3 and letting it /war is in any way different than what has already been done for Thief. Just because I can sub warrior doesn't mean I do all the time. The jobs own limitations and type of event you are participating in dictate what you are generally suppose to sub. What is the point of further restricting the jobs ability to do damage in a situation where it's suppose to do damage, furthermore, why would a person even care?
Just because Bst can berserk aggressor and have 10% more Double attack, That means we are out DDing Ragnarok/Resolution 2hr Warriors? Ragnarok Dark knights? What about an Ukon War, Apocalypse Dark knight? How about an Amano/Masa Sam? Simply a TP bonus Magian Samurai then? The Jobs not designed to do DD? Where exactly does it state that? If it did, and i missed the memo, in what situations am i beating said above DDs outside of solo/duo content?

What exactly does anyone gain when Beastmaster is able to sub a superior sub job to ninja?
Alternatively,
What exactly does anyone exactly lose?

The answer to all these questions? Nothing, Nothing changes. Your Dark knights your Warriors your Samurai and all your current Top DD stay top DD. Beastmaster isn't changing into /war on a regular basis because of the jobs own limitations when it comes to snarl timers and healing. When it comes down to it, /dnc is a superior DD sub anyways because you actually have the ability to take damage and recover it with Waltz3 and Drain SambaII, You don't need to turn away and cry in a corner because the monster under the bed scolded you for putting your pants on backwards like a little pre-schooler. What, are you going to do when you pull hate on /war? Switch into Regen gear and wait it out while your pet solos like when you were /whm? Rest? Pop some potions on an already gear intensive job?

You truly have zero understanding of the job if you don't understand how niche /war would actually be.
If you want to get right down to it, for MOST of the situations where you would want to sub warrior, You would probably be better off changing your job entirely.
The point is, there isn't any harm going to be done in doing so and giving the Job a better DD sub by giving it Dual Wield 3. I'm more interested in Tier3 DW for when i'm subbing Dancer, just so i can be of the same Tier dmg wise as ninja.