Last I checked the reason the blaze loop was useful was because of it's use as fuel on the EMC cycle. It that doesn't exist the exploit no longer exists as macerating blaze rods was awkward in itself (and something I convinced my server admin to stop doing)
I think people overestimate the value of diamonds in the current FTB packs. Direwolf20 has mystcraft where all I need to say is dense ores and everyone will understand. Mindcrack has twilight forest and gregtech, which both add ways to get diamonds easily (nikolite makes diamond dust in a grinder, twilight forest hills easily net you 100+ diamonds each on the large hills)
I think people overestimate the value of diamonds in the current FTB packs. Direwolf20 has mystcraft where all I need to say is dense ores and everyone will understand. Mindcrack has twilight forest and gregtech, which both add ways to get diamonds easily (nikolite makes diamond dust in a grinder, twilight forest hills easily net you 100+ diamonds each on the large hills)