I can offer a few comments from the HANA Product Management side.
>From the release notes its hard to ascertain if the Studio performance and hanging issues are addressed in revision 62
This is true. Currently the Revision release notes only contain server changes. It really doesn't contain any notes on changes/fixes in the Studio client side. We know this is a gap and we do have some steps to improve this; but these changes won't come immediately. Please know that in just about every revision there are fixes in the Studio. Critical fixes are constantly being merged to the revision code branch.
> with an indication of whether its compatible with appliance SPS6 60
The general rule of the HANA Studio/Client is that it always attempts to be backwards compatible. Generally it should be safe to run a newer version of Studio than server (but not the opposite). I say general rule because there have been a few exceptions. For example in SPS6 (Rev 60) we made major changes to the XSJS debugger on both client and server side. Therefore the Rev60 and higher Studio can't debug against a server lower than Revision 60. This break in backwards compatibility needed special exceptions and we only allowed it because of the major improvements it provided and that backwards compatibility would have been very difficult to maintain. It was also allowed because this change came at a SP level.
>although important to the individual the bigger view is a stable IDE we can use to then create and discover these wonderful things
Please know that I have forwarded several of these thread to the various Studio development managers to review as well. I can tell you that my personal experience doesn't match yours. I use HANA Studio all-day every day and I've used Rev60-63(still in internal development); and I've not encountered many of the problems you describe. I would say my experience has been quite stable. I've also taught several workshops on AWS (my own install; not the developer center image - but still it was Rev60) and they also have not encountered this situation.
Perhaps some more information we could provide to development - Are you installing HANA Studio on your local machine or on an AWS instance? What Java SDK (Version and flavor) are you running? What OS - 64 or 32bit? Just trying to see if there are any common patterns we are missing.