Truth to the matter is: if anyone was to properly explore - as in scan every astronomical object - along the way to, let's say Colonia, then I guess some people that started in beta would still be half the way out there 
Okay, I may be exaggerating a little, but the fact is - with galaxy of this size, "proper" exploration is just not viable, unless it is the sole goal of such venture.
Like, for example, mapping systems in certain area for colonization.
This is the reason why I would prefer nicely-shaped bubble, out of which you need to expand into unknown fringes, where another system along the way is only discovered when in adjacent systems. Or otherwise but the point is - nothing that can be introduced now, so far into development.
I guess it's just the way it is. Accept it, or have a problem with it constantly. Your choice.
Okay, I may be exaggerating a little, but the fact is - with galaxy of this size, "proper" exploration is just not viable, unless it is the sole goal of such venture.
Like, for example, mapping systems in certain area for colonization.
This is the reason why I would prefer nicely-shaped bubble, out of which you need to expand into unknown fringes, where another system along the way is only discovered when in adjacent systems. Or otherwise but the point is - nothing that can be introduced now, so far into development.
I guess it's just the way it is. Accept it, or have a problem with it constantly. Your choice.