Hello,
I'm sorry to hear that you're experiencing issues!
The issue discussed in this thread is not related to v7.3, but rather to the legacy RutOS versions (≤6.9). It can happen when upgrading from legacy to current versions. It will not fix itself by downgrading.
As for the other issues, as this is quite a big release (not only WebUI design changes, but a lot of things changed in the backend), some minor bugs might slip through, however, v7.3.1 is just around the corner and should address quite a few issues.
If you experienced issues, we suggest reporting them here, in the forum, so they can be addressed. However, if the new firmware release does not work for your setup, it may be worth waiting for v7.4.
Again, we apologize for any inconvenience caused.
Best regards,
DaumantasG