The SMP in question is a virtual server but it has 4 vcpu. The rest of the console runs very quickly.
The applet loads within a reasonable time on other remote IE sessions. (W7 IE11, Java U55)
We tried rolling back to a previous version of the JRE (update 55) and it still takes a long time to load on the 2012 R2 server.
Yes it does help to hear if its working for others JoeVan - thanks!