I didn't know that ... I thought it was widely expected the island would be significantly smaller ... and really there is no reason the island to be that big, it was designed ~30 years ago anyway
Nah, the rumours were always talking about a ship that was basically like Liaoning, and there were a few mentions of the island by big shrimps over the years and the consensus was basically "expect no major changes".
Remember, 001A is meant to be the low risk, earlier-to-arrive option. I'm sure they could have substantially reduced the island if they really felt the need, but that would've made it a little more costly, a little more risky, and more importantly would've caused delays in time which were probably judged as not worth it.
The fact that they've obviously redesigned the island has already exceeded my own expectations; a year or so back I would've been expecting an identical island to Liaoning.