Bear in mind that in the U.S. 99% of pilots are english native speakers who will understand abbreviated and non-standard communications pretty well. Here in Europe, less than 10 percent are native speakers, on the rest of us English has been forced as communications language. A lot of pilots have enough difficulty with standard communications already (ICAO Level 4 obviously does not mean a lot) and will be totally cut-off by anything else. Therefore stick to the standard and everything will be fine. The time you save by abbreviating will be needed two times for explaining the one foreigner in the circuit what's going on around him.
And the fact that places like Amsterdam, Paris and Frankfurt (who rank high among the busiest airports in the world) function like clockworks clearly shows that standard ICAO phraseaology is perfectly up to the job.