the images I've seen online look like the type of faux livery used in many "Airline Simulation" games from about 15 years ago.
IMHO, the main issue is that the Shamrock looks "weak" with the stem curving back, the current "italic shamrock" or a slightly revised version, on the proposed design would look stronger.
I like the font, the current type face looked dated when it was adopted.
Overall, it could have been a lot worse.
JAS