I saw the originals when they were first broadcast, and have since seen the remasters. The latter definitely improve on the look of the series, but incrementally, and they also suffer from some of the same problem that led the makers of Generations to underlight scenes on, and finally blow up, the Enterprise-D: while TNG's space effects were on par with movies of their time, its sets and props were decidedly not, having been designed with the understanding that SD TV quality would hide a lot of imperfections that would be visible otherwise. Beside that, the pillarboxing necessary to render 4:3 content on a 16:9 display feels really obtrusive these days, or so at least I've come to find it since 16:9 became the standard.
The thing about B5 is that few of its space scenes involve much compositing, since they were all CGI from the start and compositing was hard back then. For that reason, I think a space-effects redo would be unusually feasible for that show, albeit still too expensive for anyone to actually do one.
A harder, if smaller, remastering issue would be that they shot practical effects on video and special effects on film, largely due to that being the cheapest option for both. In standard definition you can't really see the difference, but watching the show today you definitely do.
The thing about B5 is that few of its space scenes involve much compositing, since they were all CGI from the start and compositing was hard back then. For that reason, I think a space-effects redo would be unusually feasible for that show, albeit still too expensive for anyone to actually do one.
A harder, if smaller, remastering issue would be that they shot practical effects on video and special effects on film, largely due to that being the cheapest option for both. In standard definition you can't really see the difference, but watching the show today you definitely do.