All of the above isn't cheap. Splits are not as favorable as the headlines would have you believe and if you're a one issue agent (and your issue is highest commission split possible) you're probably better off at one of the companies racing to the bottom.
It's a growing company and by default change is constant. People will come and go, expect it.
You will be shunned by your former company when you leave, the industry, as a whole, is scared of COMPASS. It won't affect your business but don't be surprised when it happens.