Not to be too cynical about it, but 1.3.6 was confirmed to be next as soon as the "PC 1.3.5 is Live!" OP by Safeman. Where did these '1.4 is next' rumours come from anyway?
Imo I think people are asking the devs for a bit too much when it comes to 1.4. What with 1.3 introducing the final boss of the game it feels pretty complete already so it's nice of them to even do these little hotfixes at all.