It would be lovely to have some uninterrupted time just playing the game.
The Legacy game is near-guaranteed by Frontier never to be altered in any way, and only patched in emergencies, and therefore has much more consistent uptime. Catch is, of course, it's near-guaranteed to never be altered in any way (and so the two accounts aren't compatible).
Still, even if you generally wanted to use Live, you could get yourself a Legacy character and play them instead during the few weeks after a big release.
The downsides are rapid expansion that they've now halted
Is that a downside? Or rather [1], is it in any way unexpected given the parameters?
They said 8000 systems were completed. Let's assume most of them, at least, were outposts at ~20kT of cargo each.
Multiply up and that's 160 million tonnes of cargo.
(And sure, a bit more delivered to build things bigger than a Coriolis, and a bit more delivered to build things after the starting outposts and to incomplete-at-time-of-writing systems)
That sounds like a lot ... but it's only marginally higher than the all-time 1-week record for a trade CG (which was also a "build new systems" CG, interestingly), the purpose of these new features is to be popular and bring people back to the game who were taking a break, and the targets have been set well within the normal capabilities of an established player.
It's a lot more rapid expansion than
players might have expected - we were presumably thinking more in terms of major tasks where a big group might have got its first system confirmed by now - but must surely have been no worse than the high end of what Frontier expected.
[1] I've been saying for a while that 20,000 systems is way too big for the bubble to be, so in that respect doubling the size makes things worse. But when it comes down to it, once you allow Colonisation at all you've clearly decided that's both unfixable and it's better to work with features which don't care about the bubble's size in future, so that's (like the introduction of Fleet Carriers was) the change in direction.