The linked change fixes the price:

• Assets with symbols of 6, 7, or 8 characters cost 500 BTS to register
• Assets with symbols of 3, 4, or 5 characters cost 500,000 BTS to register

Obviously not ideal, but potentially good enough. bytemaster picked this formula--I would contact him directly to have him post the motivation here because he may not see this post otherwise.

yet another interesting experiment ...

Really? Another price feed for delegates to update? We already have a price feed for BitUSD. Just use a fixed reasonable number priced in BitUSD and dynamically convert it into a BTS amount using the BitUSD price feed.

You could even make regular transaction fees priced in BitUSD as well.

The OP was originally an update to my proposal in https://bitsharestalk.org/index.php?topic=10597.0 but immediately after I posted it, I noticed the Github ticket was closed.  I didn't want to confuse anyone by posting a list of rules different from what we actually implemented, so I deleted my proposal from the OP and changed it to ask about the contents of the ticket.  Sorry if I confused anyone.

EDIT:  Could we get a comment from bytemaster or vikram on the UIA changes implemented for https://github.com/BitShares/bitshares/issues/826 ?