So, what's with the lack of Machinist in DF?

[Aethaeryn]

well the trouble is the dps of the machinist are quite random in comparaison of some other class, means is not as fun than other to play.

Not really that random, especially with quick reload being 15s now. You might have some random outliers where you get all crits or no crits during your opening wildfire, but even that doesn't make a huge difference in a longer battle.

MCHs and BRDs makes every run feels so slow.
not to mention the lack of melee lb.

when i queue as drg and i get paired with brd/mch and the heal/tank are non dpsing whm and pld, it feels like i do 80% of the damage

It's duty finder. I run into just as many terrible dragoons as I do bards/machinists. Seriously, like people who would do better if they just stood there and spammed their 123 combo. Also, melee that don't aoe ever...