I don't understand the benefit to any of this, to be honest.
Being able to teleport to a base via a command should have been removed immediately rather than letting people get used to it being there.
I don't understand to what detriment it is to allow people to just teleport to a base, I mean there's a ton of Portal SG bases catering to the desire to fast travel. So you /know/ the desire for it is there. Now those bases have essentially been made useless, which means work and effort put in by said Portal SG creators were just thrown out of the window.
Granted, you can still use the buttons if you're near a base portal. However, with how large the zones are, it still effectively makes travelling tedious and for lower levels, dangerous. In order to still utilize those slash commands, one needs several million for all of the prestige teleportation powers. Again, not possible for lower levels.
I see a lot of 'Well, all you have to do is earn the powers to do all this.', which is great for those who not only know how to do it, but CAN do it, but what of the newer players? Earning the powers requires badge hunting, which will become all the more difficult to do with this particular change. This is also going to make the process of going through story content a lot more unpleasant, because it's going to take that much longer.
Now, I'm not saying I want an 'Easy Button' added, not at all.
What I am saying is, a lot of people enjoyed the option to fast travel by way of those Portal SGs, and a lot of people utilized them. No one, of course, was obligated to utilize them. They had the option of both normal travel and fast travel. You could have just turned those slash commands off for PVP zones. It seems like a much simpler solution than to do away with the ability to choose which method of travel you preferred.