It's pretty ugly, but if Flow is somehow dearly bothering you, this new theme might be something you should look into.

If only they added a black outline to the text and Icons, it wouldn't be so bad... The PS3 didn't have this problem...
The music and audio also changes, apparently.

Rectangular is a cool free theme. Has plenty of neato visuals, music, and sounds. Kinda reminds me of the older PlayStation dashboards.

I used black Flow. It's really relaxing for some reason...

Here's hoping we get more Destiny themes (maybe as part of the season pass, Bungie?) :T

Also, might be a bit early mentioning this, but remember that if you want to try out some of the new DLC content before you buy it, you can use the new Share Play mode on PS4 with anyone who buys the DLC. You can theoretically play it all you want (in 60-minute chunks) and then decide if you think it's worth $20. I'd be happy to volunteer my system for those curious...

Rectangular is a cool free theme. Has plenty of neato visuals, music, and sounds. Kinda reminds me of the older PlayStation dashboards.

That's what I'm currently using. It reminds a lot of the ps2 and I think that's why I like it.

I can only see three themes in the PS Store.