1) Jump cues are great great for the industry.
In snooker for example a player may own 1 or 2 cues their entire playing life...in American pool, even most amateurs get through more than that in just a few years. The industry needs innovation and new equipment to exist.
2) Jump cues are great for tv.
Well, jumping, rather than jump cues, but its (almost the same point). Jump shots make any highlights real and add tension at events like the Mosconi Cup. In order to attract a fan base pool needs to create a niche away from the established snooker world and going more traditional and less dynamic is absolutely not the way to do it!
3) Jump shots don't actually come up that much.
I suspect I use my jump cue on average maybe once every 50 racks or so (and I might be over estimating). They don't really influence the game that much, they are just another option for players.
Personally I will decide to kick or jump based on a) which is the higher % chance of me hitting the ball and b) what is likely to provide the best outcome if I do make a legal contact. In most cases, its actually the kick, but if its a dead straight shot, having to jump over 1 ball and I have a chance to pocket a ball...then I'll probably jump!
4) Jump cues force better safety.
With modern jump cues, you really have to get tight in behind a ball (or cluster) to take away the option of a jump. If you leave your opponent a chance to jump, its just the same as not getting a full snooker (or hook I think you guys say), its not the person jumping who's at fault...
5) Jump cues aren't that easy.
Well they sort of are, but if you watch a the pro's play you'll notice some favour jumping more, some don't. If it was that easy, they'd all reach for the jump cue straight away, but in % terms, often the kick is the better shot. The jump may provide an easy hit, but that doesn't make it the right shot. To get a good connection and good position when jumping is a difficult skill to master!
Most of those points (probably all actually), are points others have already made on this thread, but I think they are a good summary of why jump cues aren't going anywhere and why they shouldn't.
As for racking...speed and consistency are all that matter. Triangles, templates or tapped tables, it doesn't really matter...but consistency across multiple tournaments would be a good thing (I think World snooker uses exactly the same triangle for every event for example...why doesn't the WPA dictate any sanctioned event has you use a specific method of racking)!