I've said it before and I'll say it again.
Tilke's hands are tied when it comes to designing tracks.
He can only work with what he is given and on top of that, Bernie has a significant input into the process.
This was aptly demonstrated in a documentary I saw a year or so ago which basically showed Tilke having his design rejected over and over again until Bernie was happy with it.
On top of that he has to design within the FIA constraints which are very detailed.