Wouldn't be any impact on fresh air intake - just means that you are expelling crankcase oil mist/vapor to the atmosphere, and depending on where you leave the tube hanging, you might get oil spray on your rear tyre - not good for grip. The crankcase hose to the air box is a pollution device, it has little, if anything, to do with the performance of your bike.What do you think if i pull the tube out, tape the airbox hole and leave the tube hanging outside for the time being? would that be a huge impact on a fresh air intake? (i wont be riding daily, i would just ride to the mechanic to see if he can do the compression test etc..)
I would suggest attaching a small filter to the end of the hose, (and even replacing it with a longer piece), and moving it somewhere where any oil from the filter wont get near your rear tyre.
Attach something like this: