For the first suggestion, I like the first idea because it's not changing the Machina much. The change is only a glow effect. As if the Machina's +15% more damage bonus is OP, it's not. You only get it when you're 100% charged up, so it's basically a Sniper Rifle with a +15% bonus at 100% charge. K? K. Adding glow is not game breaking.
For the second suggestion, not giving the Machina any glow (much like it does atm) and giving it a damage boost seems considerable since this sniper is meant for tons of damage. It is not meant for super accurate Snipers because the -10 bullets held is a huge drawback in how much dmg you can deliver before jumping down off a ledge you climbed up with a Bushwacka. I will do the math and post y'all link. I wouldn't say it'd be game breaking, but I guess it's a bit of a nerf in a sense you deal less dmg with 10 less bullets. I don't know. We're not all 100% accurate snipers. Link >>>
https://dl.dropboxusercontent.com/u/55914318/machinasuggestion%232.pngFor the third suggestion, you went from 25-35% boost to a flat 35% boost AND outline. The previous idea ^ is inferiour to this one. You get a full outline (the whole whatever the heck long mark with the Sniper Rifle glow) of Hale, and not the 50%. Moving slower scoped in is nothing bad at all since you'll be camping in a ledge because of Bushwacka. Even if some people rely on WASD, they will get used to the slow debuff because you're dealing 35% more damage than the SR, really. You DO NOT get a -10 bullet held thingy, but instead you can only get ammo from ammo packs. Considering some maps prefer small ammo packs or max ammo packs, I don't see a problem. You're a Sniper, Hale won't notice you with that tracer. Just go get ammo and back. I see this suggestion as game breaking, really.
Out of all three suggestions, I like the third one and first suggestion. The third suggestion is game breaking and adds a new playstyle for Machina Snipers on VSH while the first suggestion is just a tiny "scouting" buff for the Machina. I was tired when I typed this, so please give feedback and opinions. I want to see the flaws of my genius work.
EDIT: Remember, all theoretical, so protect the children NSFW.