Nah, uBO is fantastic. The problem is nearly all other purported adblockers. Some of them are ok/mediocre; most (like most browser extensions) are just outright crap or malware.

The moral dilemma here seems to be that Google is unwilling to privilege a good-citizen adblocker like uBO over other extensions; they're an ad company and any explicit step towards promoting an adblocker probably is hard to explain at shareholder meetings, even if the engineers want to.