The thing is the Scientist is way too good at everything.
He can be a Support character, DPS character, Assassin and not every Scientist has to be in your face to do the damage, both Paleontologist and Astronaut say hi!
People say he only has 100 health, 110 with the health upgrade.
Well that's simply not true in the heat of the battle. He can lob in a heal ball before attacking a group of plants to ensure another 50hp of health as he warps in or the kill, once killing that pack and he will kill that pack. He can assess the dangers around him, if other plants are coming towards his way he can warp the hell out of there, otherwise he can just find a nice quiet spot to place his healing station down just intime to heal himself enough to lick his wounds.
His burst DPS is way too strong for this type of character. If you are going to be a glass cannon then that's what you should be, not have the utility to heal yourself after every battle in different ways.
Also and this is a valid complaint. Not one Zombie class has a pure support class, so why did Rose get nerfed into that role while Zombies didn't. I wouldn't mind seeing the Scientist receive that type of nerf and place him into more of a healer role.
That's one of the reasons this game is unbalanced atm. Zombies just have the advantage in offense and it clearly shows.