I have some concerns about user-issued assets:
Q: What is the point of them? They can be issued 0-100% at any time so what gives them any value?
Q: What happens when assets are created with illegal/offensive names?
Q: Will we get a voting process to delete offensive assets or ones that no one cares about anymore?
Check out these spammy specimins:
ID    SYMBOL NAME                    DESCRIPTION                                     ISSUER                          ISSUED    SUPPLY                      
===========================================================================================================================================================
24    IFTN   If-Then-Coin            A super coin with If then algorithm invented... tbkmcjl                         1.00 %    1. IFTN
26    NOK    Norwegian krone         1 Norwegian Krone                               norge                           0.00 %    0.0000 NOK
28    STAR   Star                    Massive, luminous sphere of plasma held toge... bitcoiners                      0.10 %    1,000,000. STAR             
There you've even got a user-issued asset that looks like its pretending to be a market-issued asset (NOK).
IMHO a limited set of market assets controlled by Invictus through software updates was the better approach.