Jon-Paul,
after reading this response, i can confirm the exact same issues on SP6 AWSHANA. i did some work on 56 and issues were similar, but i knew a lot less back then than i do now, but the recurring performance issues are quite disturbing, especially if one plans to present in front of a client.
this is simply not helping to spread the good news how revolutionary HANA really is.
plugging away...
greg