How about we stop making things more powerful and adding more things?
Had a couple of thoughts on some roles.
Mad Scientist:
Change to the Sentry Guns: Functions like the paranoid war vet, attacking and killing anyone who comes snooping around the Mad Scientist's house. However, it has limited ammo (it is just a prototype version), and only works for one night. Should the Mad Scientist be attacked, it is the Sentry Gun that is destroyed not the Scientist. Once destroyed, the Sentry gun cannot protect against any further attacks that night.Like the War Vet's ability, the gun can be turned off for a night. This makes the house safe for friendly visitors but leaves the Mad Scientist vulnerable to attack.
That should make the gun much more useful (since no one has ever taken it, I figure it's a bit weak).
New Gadget (For MS and Aliens): Mind Control Ray: Once per game you can choose the target of another player's Night Action. If the player does not get a regular night action, or has a limited use Night Action and did not choose to use it, the ray is wasted. If used on a Doppelganger without a power role, it can only direct their action if they are the one performing the night kill.
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Changes to the Alien Scientist to make him more likely to actually win:
The Alien Scientist gets 2 tech slots
The Alien Scientist is immune to Night Kills from non-aliens (he spends the night in his space ship studying people).
The Alien Scientist only impedes the victory condition of the Exterminator.
Thoughts?
The Alien Scientist is dumb. That means you have how many nights to study how many people?
Let's math it up: You have 18 people, 4 dopps, 1 EA, 1 OA, 1 Scientist.
This means Night 1 you have a total of 1 lynch, 0-3 kills, with one person studied, who may or may not be killed.
1-4 dead, 1 studied.
Another lynch, 0-2 dead, 1 studied
2-7 dead out of 18, 2 studied.
That means out of 11 people, you would only have 2 people scanned. The likelihood they will remain alive? Not very.
Also, you have just become the most important town baseman EVER. You can't die, you find out roles and you roleblock. You're basically a Kill-Immune Combined Cop Roleblocker. No one's going to lynch you. The Exterminator may try to kill you, but that's pointless unless he finds you out.
So, your only chance of winning is to find the Exterminator Alien, kill him, then make a secret deal with the Doppelgangers not to reveal them for their kill information, as well as guiding the town exactly.
Then you might have a chance. But then you really can't lose. It just seems... lame. I think the way we had it before with the few roles we had was simple and eloquent, but the many we have now is too much. Maybe if you made multiples of roles or something and cut back on the number of different roles. It'll be more fun, since more people will have roles, it'll make Doppelgangers not have to worry about claims, and it'll make the game less crazy.