mm... maybe.
VisIt's not possible because it goes with the model of the point itself, you need a different model and a server running sv_pure 1 or 2 (not sure). You get used to the icon after some games though
those are separate models. there are blu/red/neutral models for the hologram, and then the point is a single model with different skins applied to achieve the different glow colors. the hologram makes up both the logo and the aura effect.
edit: sorry, it's one model for the hologram, not three. the model is changed with bodygroups but it's technically one model. the point itself is still a different model though, because they reuse the same holograms over payload capture points