It's just the fact that we said it will be around for months and here we are people are already wanting to change it, and it's not just glitches, it's new move mechanics as you suggested some changed to Falcon and Ness among others.
A lot of people were really put off from the constant updates, the game kept changing everytime they went to play it. Even further, the nightlies or weeklies were dubbed as experimental and not standard, yet whenever tourneys tried to use the official build and not nightly/weekly people complained. Now here we are with a release we said would be around for a few months minimum, and it's on it's way to being changed now.
How are we so sure these are the changes we want to stick with? We're going to change this and make RC2, then immediately think of things to change (especially concerning RC2 changes imo) and then make an RC3 right away.
If we're going to make some changes, why not make more? From all the recent stage discussion there is plenty that we would like to change, but won't and can't in the time being since we're kind of locked into this whole RC1 phase atm. If we go ahead and make RC2, then why not add the stage things? However by doing so it nullifies the stage votes for any stages that would be changed that have been voted on so far and it would have to be re-done. Not to mention people already practicing for future tourneys.
Changes are constantly being made with very little proof or reason. We also have BtL2 announced for using the RC1 on November 14th, and I guarantee you people are already practicing for that. Not to mention with online registration, people are already laying down money with full intention that it's RC1. What if for some reason they don't like RC2 and they don't want to enter anymore? Tough luck.
Even with all this in mind though, it's going back on what we said, RC1 sticking around for a few months. Take the time to collect some data. Make RC updates more "updated" than just changing a move here and there. Collect data for a while, make some updates, test them 100% only in the WBR without releasing them, tweak as needed, then release a proper RC2 release.
If you guys never give ample time to test a build then you will never settle on a final decision. Nothing will every be 100% perfect, realize this. And everytime you modify every small thing (even the tiny things in this proposed update), a lot more than what you expect will change.
Give it time.