I haven't been playing Titanfall today but hopped on quickly to get a gif example.
This was my very first kill in my very first game. I spawned, bunny hopped around the building, wall ran, jumped off, killed someone. Kills like this account for maybe a fifth or so of my pilot kills when using an SMG.
Using something like the Hemlock isn't great for this kind of playstyle, as your ads accuracy gets swayed when falling or wall running and hip fire is unreliable. SMGs are unaffected, so I just don't need to stop. It's just more fluid and versatle than the Hemlock and G2.
Not that those weapons are bad, not at all, but they definitely favour more grounded playstyles, even if they can be used in more aerial situations, that's not where they shine.