While it is a broad subject, I think it is a mistake to cut events apart into their component constituents and have a bunch of separate events.
Think of it like this, lets say you have, hypothetically, five 'bands' or 'singer' characters, and you want to have a show for them. As cool as it would be to have your own show, I feel a far better option would be to have all five perform together at one show, thus pulling in all the people who would attend one of the band's shows, and bolstering all the other bands in the process. Contrasted with, each band does its own show and is only attended by its own fans. All the events are smaller and involve fewer people.
The EVE RP community is already small, and is already highly divisive. The last thing we need is more divisiveness. We need some level of unity, some level of cohesion. We already have SeyCon, a popular, heavily attended event that pulls in people who otherwise merely lurk in the background. I've personally avoided putting together my own symposium type event for just these reasons. I certainly have a stake in the events, and the knowledge of how to put such an event together, but I don't want to take away from SeyCon.
The other thing to consider is that having a small, limited scope symposium will be small and attract a small scope of people, what will it actually accomplish that could not be accomplished equally well if not better, then a panel/series of panels at a larger event? We should be focusing on building up SeyCon as much as possible, because the bigger it is, the more draw it has, and the more interesting things could come out of it.
TL;DR: Given how small the community is, we should focus on having one good, large, well attended conference/convention, instead of having a bunch of little, sparsely attended ones. Whether that ends up being SeyCon or whatever replaces it, I think the idea of 'small science conference specific in scope' is not the best idea.