The LiveCD installer is slow - horrendously slow - and unreliable. The only meaningful difference between the LiceCD installer the old graphical installer is that the LiveCD installer takes forever to boot, fails to work on a far wider range of hardware, crashes more often, and lets users get a very bad first taste of Linux.
The alternative installer is also buggy and fails too often, probably due to getting far less testing. About 50% of the systems I try to use the LiveCD installer on fail, and about 25% of the systems I try to use the alternative installer fail. These exact same systems could install older versions of Ubuntu with the old installer just fine, and can install Fedora, FreeBSD, and Windows XP just fine. The new installers Ubuntu has been using are utter crap.
Please reinstate the primary preferred install medium to be a regular graphical installer like every other sane OS uses, one that actually works reliably and without requiring 6+ minutes just to boot the CD, and relegate the LiveCD to the useless gimmick bag where it belongs.