... and why exactly do they need to change the ticker and halt the trade for three days?
It is quite easy to sell and acquire shares with the push of one button ... and it is not unheard of that even new companies take over existing tickers - even if they have nothing to do with the previous ticker owners. How hard would it have been in the case of Heartland?
Just a bunch of selfserving time and money wasters - and the fact that others are as wasteful (like TNR - TRA) does not excuse them.