I cant see any possible way this can be recommended to a novice user. compared to the number of steps it takes to find things, it is more difficult to use the new UI.
even with windows 7, the new start menu annoyed many users, luckily someone made a classic start menu app.
there are many users who when they look for a program, they are not 100% sure of the name, some like to go based on the icon picture, and some use a mixture of the icon picture and the overall shape of the word (which is how you read when speed reading.
As part of a project for a psychology class, I did a test on how people read, and by forcing someone to speed read, you can take random words in the reading and turn them from
this
add a stroke over the oudside area of the word, then remove the inside leaving only the first and last letter normal so that they can only see actual letters in the first and last letter of the word, everything else is the outside shape
People can were still able to read the randomly altered words without mistake (this has been done by many in the past, when reading we don't read every single letter in the word then figure out what word it is, we go by kinda a facial recognition, for example someone showed you a picture of a close friend, you could most likely tell their name based on the picture. For words, it is the same, based on the overall look and not the letters, you can tell what a word is as long as you have the first and last letter
Most people when skimming through something to look for a program but cant quite remember the name but can tell you something like "I will know it when I see it" or something like that, is using their facial recognition abilities to know what the name and possibly icon of the program looks like even if they don't remember the name.
By removing that option from the OS, for people who are used to finding programs through facial regocnition will have a lot of trouble with the new UI.
For me, I mostly do this since I have a ton of windows program and my windows xp start menu takes about 3/4th of the screen when fully expanded. But compared to any user using the search, I can find any of my programs extremely quickly, generally well under 2 seconds to get one that I have not used in a while. Because it is sorted by name and I recognize the overall shape of the word.
(I am the type that can go through a giant reference book, flip through a ton of pages then quickly find a word on a large page with small font.
on windows 7's default start menu, it takes me much longer to find things in the start menu because I am forced either scroll through the start menu, or type the name, both of which take longer than me putting up one that takes up most of the screen and in under a second, spotting the program I wanted to launch.
Ubuntu does the exact same thing, it forces you to search or go through a ton of menus to find a program rather than spot them in a list.