I remember back when I was about 7 or 8 years old and seeing the OG ghostbusters then having that exact reaction when I saw it. I was like where hell are all characters I know, and what the heck is this? I did watch both shows as I tried give most things a chance but the filmation ghostbusters was not remotely as good as the Real Ghostbusters.
The real ghostbusters despite being a kids show managed to have some rather scary monsters(the boogy man and grendal were pretty nasty bad guys.) for some of the episodes and always kept a bit of serious tone to it. Every member of the show had episodes around them, which generally were likeable and had a point to them.
I disliked most of the characters in the Filmation Ghostbusters. Jake was a know it all who just annoyed me, and Eddie was too dumb and screwed up most the time. Tracy was usually the most competent one, but being a freaking ape gave me no one I particularly liked or rooted for. I dont know how the ghost busters could stand working in their lair as every object there was sentient and had a bad attitude..especially their car. In general the show was just too zany and went off the rails to point was lame at times. I do give the show props for having continuity to the original show as the original characters(the fathers.) appeared in a few episodes. Over all was ok, but I can understand why and how this show was easily forgotten by most. If it didn't share the name with the movie and other cartoon it would likely be even more obscure than it already was.
Regardless of what others have said, I think this was acool topic to have brought up. I knew the majority of the stuff mentioned as I looked up details about most shows I used watch as a kid due to some sites I frequent having threads taking trips down memory lane. (Galaxy Rangers, Centurions and M.A.S.K. were all previous favorites from the 80s I enjoyed. They held up alright rewatching them as an adult.) I can see how tons of people likely never knew about this or completely forgot, but with Ghost busters 3 coming down the pipe in next few years it's probably a good primer for it. Chances are people are going be bringing this up then anyways. Might as well be the first to know here right heh.