They should have more rewards in general. 2500 favor and reaching level 30 are obvious milestones to include more general rewards for every season. But they can also include more specific rewards for different seasons, such as defeating X number of raid bosses. Or– to borrow from IoD– completing a set number of quests while cursed etc. The possibilities are endless!
----------------------------------------------------
I do really feel for the folks that are finding this HCL rough to get into. Don't give up hope entirely. I will say that maybe after a few days and with more knowledge/practice under our belts – we will be better placed to deal with the hounds and the like. I also understand people love DDO for trying out different builds. HCL does necessitate building for more survivability. Maybe this time go for a bit of that, sure. But also ensure you have a good amount of dps as well to take down the hounds asap.
And the other great part about HCL is how it brings people together from every server. And this means more opportunity to group up and find like-minded players. Try reaching out to one another on the forums here or in game. You may find other folks who are happy to do the difficulty you want, and go at the pace you want. Besides– grouping up with others is always more fun. Particularly on Hardcore. You might even make a new friend