Yep, it’s expecially a shame since Native Instruments actually significantly de-featured Battery with the 4.0 release. Battery 3 has sample replace, and also “in-kit preview” which lets you try a sample out in your active MIDI arrangement without permanently altering your kit. You can just turn on in-kit preview and click through all the samples on your hard drive while your MIDI plays, live-auditioning every sample you select, til you find the right one. They killed that feature in B4.
If the new Groove Agent had that kind of ability, I’d probably stop using Battery altogether.
EDIT: I’d even PAY for a Groove Agent with better kit building/sample browsing abilities. Everything else about it is ace.