you can still downgrade to 5.x, but we do not support it for fre users.
I understand your disappointment, but you have to understand that development and support is not for free, we have to pay developers and other costs.
Pricing : premium edition (only edition which covers your big infra)
IBM Power 8k USD a year
VMware 11k USD a year.
20 % discount if you order both, total 15 200 USD a year
regarding your scripting above lpar2rrd data you have mentioned earlier. We can do such scripting for you as part of support sevices.
Let me know if you need an official quote.