Hi ricco, be able to freely customize seblod is also my dream, but i found out they're things that not easy as it looks. I've been using seblod for almost 3 years, but yet there are a lot of things that i still unable to understand to reach some geniuses mind in Octopoos team.
in case of changing "ajax loading indicator" its very easy process.. you can replace the images and it done !
About color, UI design, etc... its just matter of preference, i don't think its a big issue here.
FUN FACT:
When seblod 2.x arrived (i think its almost 2 years gao), Octopoos team calls "the views" as "client".. and we 'argue' it for days to not use terminology "client" for admin site, site form, intro, content, search, list, etc... and then the words 'views' born.. So, yes, on some cases Octopoos team can be argued.. ha ha :D ... and till today, we don't still have good terminology for that padlock icon, right ? :D