I think both of the JRemotes and Gizmo work pretty well. We have made minor changes from time to time. We'll eventually do more but not very soon.
From a business perspective this is an interesting decision.
One the one hand, the revenue from JRemote on both platforms must be pretty tiny compared to the revenue from MC proper since JRemote only costs 1/4 to 1/6 of an MC license (roughly). So development time spent there wouldn't seem to yield the most dollars based on licensing fees. Then of course you have one or two people complaining that the low price of JRemote is actually "way too high", which is discouraging.
On the other hand, JRemote is "the face of MC" for a good number of customers. I'd be guessing at the numbers. But I'll bet something like 1/3 of the overall active customer base uses JRemote most of the time, rather than Standard View or Theater View. That makes the JRemote interface the very most important interface to those customers.
Of the small number of people I have personally converted to JRiver MC, all of them use JRemote just about exclusively. Certainly it's the only interface they use when they want to listen to music (as opposed to library maintenance, playlist building, etc). In fact, JRemote is the strongest selling feature of MC for non-technical customers. It's beautiful and mostly intuitive to use; it's very intuitive for basic operations.
So the question becomes, how much work do these JRemote versions need? It seems like there is work needed to me, but I don't personally use JRemote. I see quite a number of feature requests for JRemote. I see an almost equal number of bug reports like the one above about the Date field.
It seems to me that some engineering time is way overdue on both JRemote products. Which would be very, very appreciated by some sub-set of your customer base. ...and if JRemote is really what sells some your customers on buying the MC platform, then that strengthens MC's overall revenue and reputation. Making JRemote better should sell more licenses of MC.
As always, just my opinion.
Brian.