The JTV-59 is my main guitar. I will definitely buy a second one as backup. It is very versatile and the setup and quality is better than expected in this price range. The only thing i could criticize is the fretboard quality and the lack of options for neck, fretboard and color.
First the guitar arrived the fretboard looked more like a piece of plastic than high quality wood. After a lot of oil treatment it's ok and remember it's not a 3000$ guitar. The other thing is a problem for most big companys like Line6. They don't improve the gear they have. After a while they release a new product. Same like the JTV's. No improvement for color, neck etc. They released the standard now together with Yamaha.
The gamebreaker for me would be if Line6 would have a workmanship e.g. with Warmoth. You could choose the body type and wood, the top wood, the neck dimensions you prefer and so on. Warmoth could make all routings and wirings under license. It would be a little bit expensier.
The Dream Variax at the moment for me would be a Tele (maybe curved top) with quilted maple top in yellow and a maple neck and fretboard with matched headstock. The scale length should be the same as for PRS. Better a second one in red with a nice PRS vintage tremolo and locking tuner. ;)