(@Orb: You only want to nerf amps because you got killed by one, whereas your gunnerbot - which does not rely on the character's stats and skills, like the amps do - is OP as hell with that +3 bonus to its attacks and the fact it can act and move independently of its operator, although I will admit its exorbitant price especially compared to guns and so forth does a bit to balance it. Besides, there's already differences between amps and manipulators. One is that amps have an unknown quantity of uses based on the character's relevant stat - admittedly I do not remember which, but it's either Willpower or Intelligence - while manipulators have a known quantity. Another is that if a character has the funds and the desire they could bring every single manipulator available with them and cycle them as needed, while a character may only ever have three amps - and it's not even known if previously installed amps can be removed. I'm going to give you an example of their differences.
Let's say Jim has (X) number of uses of his amps available, where in this case X is sixteen. He only gets sixteen uses of his amps per mission, spread across all three he has - which is also the maximum amount he can get. Let's say the manipulators have eight uses per mission each. Stacy buys manipulators of the same types, +1 of another kind. Stacy will therefore have 100% more firepower at his command than Jim does during that same mission - but at the price that he has to pay tokens to recharge or just buy new manipulators while Jim's amount will refill after the mission. Additionally, Jim could use all sixteen on one amp, or ten in one and three in the other two, or six in two and four in one, etc., while Stacy would have exactly eight uses of each of his manipulators.
Really, it's like the difference between the Sorcerer and Wizard classes in D&D: the Wizard has more spells available and overall greater flexibility, but he has to plan ahead; the Sorcerer has a smaller amount of spells, but he can switch tactics on the fly. That's the difference between amps and manipulators.
As for the other, yes, little hard proof, but there was a lot of circumstantial evidence based on Travis's personality and actions up to that point. And while we're talking about how little hard proof there was for killing people, Travis killed Mason just for touching him; Jim killed Travis because Travis made it clear he was going to initiate hostilities soon. The real tragedy is that if you hadn't just shot Mason straight out and tried to, I dunno, subdue him non-lethally or ask for anyone - like me, for example - to come over and mediate, this never would have happened. But in-character speaking, you'd made it very clear that Travis is trigger-happy and any reasonable person would get rid of him before he snapped and started shooting indiscriminately.
@Yoink: If you've got a problem with me, say it. This is the second time you've sniped at me and I don't appreciate that bullshit, same as I don't appreciate having to watch my back just in case any fuckwit decides they want to start killing people for 'loot.' Yes, I have the power to stop that behavior dead in its tracks and I will use it, but if I was a tyrannical overlord I would be making some more selfish demands instead of 'just get along with each other.'
@Taric: You're my friend and all, but calling me 'Overlord' too? Not really helping. >.<)