Yes, I had the same reaction. Just make the badges more ornate for the higher pledge tiers.
Are the split tiers going to be set up such that, for example, there will be a limited $40 tier and an unlimited $50 tier available at the same time so that people can see how the pledge will change? I wouldn’t bother with the 23/25 split tier.
What I picked up on most as I read through the tiers was the lack of anything that builds a sense of intimacy with the project. This may just be the way the tiers are written, but the list comes across as a “give us this, we give you that” kind of experience. David Braben included dinner with his team at the highest tier. Yes, I know that’s impractical for you guys, but it’s the sort of intimacy that backers like to have. So the tiers need to be phrased such that backers have that growing sense of intimacy. In that spirit, getting more stuff at the highest tiers is not doing the job. I think that’s a fairly serious mistake. In particular, I find the billboard concept odd. It seems to invite corporate backing. Microsoft, GE, Coca Cola.
Play up the fact that people getting beta, alpha and developer access are ever-closer to the team in terms of feedback. Those developer access guys are going to be able to comment on the names of things, see features that might never make it to alpha, and have a chance to see the development process in detail through the builds. That’s the sort of intimacy that these guys want, and the short description needs to convey that sense; behind the scenes interaction with the great ones who are building this amazing product. If you guys had offices, invite some high level backers for a visit. That will only entice folks near those offices, but it’s a special treat. Much more so than personal skins and billboards, which are vanity items that folks with that much money really aren’t as interested in. They have all the vanity items they want. What they can’t buy is intimacy.
I think that you’re also overlooking a great opportunity to place easter eggs in your game content. Put in a limited $1000 tier to have something about the person incorporated into art assets. Carve their name or a favorite saying into a rock wall on a planet. Sneak their initials into the dirt map for a ship. Put a crude portrait into the veins of a tree leaf. Let them feel like their identity is literally being incorporated into the game.
One last thought is including a poster (or whatever size can be printed and sent out easily) of the genesis of one art asset from concept to finished model, signed by the team. Put such a reward at a high enough level that you’re not spending inordinate amounts of time printing, signing and mailing the darned things. At “executive producer” level, give them a full set of whichever art assets for which you’ve prepared posters. Having them signed by the team is critical, especially if you only say “Signed by the team”, but then actually put a hand-written sentiment on the posters when they get them.
Those posters could also be available as single images and screensavers at lower tiers - but without the signatures, and cropped a bit so that they aren’t the same as the printed and signed ones.