Be able to preview recordings and also be able to change effects in preview and or in recording without crashing the prog.

Why should you have to start, record, and then start over with a new effect? This should be able to be done on the fly for comparison purposes. Also, why should it be necessary to record your voice while adjusting what you say, intensity levels of the effect, etc? I should be able to listen in preview until I get the setup the way I want and then be able to record from there. Oh yeah, make it easier to delete an entire recording if so desired instead of having to either select sections and delete them one at a time or recording over everything all at once.