i tend to like my Kickstarter tiers to be exclusive. if i could have waited to get the knight/immortal then why would i back 2 years ago when there was nothing to show for it? why would i assume the game could be vaporware when many other software/games have done just that via Kickstarter.
to refute that, i did like what Camelot Unchained did. they opened the remaining KS tiers ONLY for those that were original KS backers. this allowed someone to upgrade. They also opened up the lifetime sub tier for 300$ (which bit my friend in STO but that's another rant).
we have a cosmetic store. and it's pretty empty. cosmetic only of course: add armor, weapons, mount armor, spell colors, etc with some concept art attached. put an expected release date for that content: IE before release, or first content patch after release, etc.
is the dynamite gold a great pre-release value or is it the same as it will ever be. will there be sales on DynaGold or the cosmetics? you could add seasonal/holiday cosmetics too (that fit within the lore of course). release it, after a month (or whatever) pull it till next year.