Jugg is easy, sure, but I agree with Foulman that this is way too extreme.
The people who actually play a lot of Jugg would know that (a) it is not easy at all to get a "99.9% win rate", (b) real players show up at least once per hour, on average, sometimes a lot more if you're the only people playing Jugg, (c) they aren't that easy to beat if they're smart (d) the bomb drop rate in Jugg is lower than 1v1 now.
After the level 27-33 NPCs were buffed, do you even know how hard it is to play Jugg as a Rank 1 40? I do, I've tried, and it's brutal. Even worse if you're a casual player who isn't even the right class (e.g. BM, BH).
And as a high rank, if you want to get anywhere near a "99.9% win rate", you'd have to try really, really hard. You'd have to make a purely defensive build and not ever take risks, especially since he made it so almost every NPC has at least one stun skill and one 25% crit skill after the buff. If you were to do this, you'd be getting wins at a much slower rate though. And the major problem with this is that most purely defensive builds (think boss fighting builds) would get slammed by real players.
In general, real players are not to mess around with if they know what they're doing. A really smart level 30+ paired with Yeti Hulk or another strong NPC is almost a guaranteed loss for most Jugg builds. And often, one stun is all it might take for a real player to sneak in the win, even if they or the NPC partner aren't that good. As I mentioned before, almost every NPC in Jugg now has at least one stun skill.
No, I'm not denying that Jugg is the most efficient way to earn rewards these days and has the highest win rate of any battle mode. That's obvious, but your suggestions are basically asking to make it impossible and reducing the rewards by 40% would make it worse, on average, than 1v1 unless you're already max rank (since in 1v1, you can get extra rewards for beating higher level or rank players).
As a major Jugg player, it always bothers me a bit when people take shots at Jugg or look down upon it. We're all just here to play a game and people shouldn't be treated differently depending on what they like to play. To say that people who play Jugg are poor players that don't know how to strategize and aren't "good enough" to play PvP is an insult and pretty ridiculous, to be honest. I don't know where the 89% statistic comes from, but that's wrong, or at least a big misinterpretation. Just like in any battle mode, there are good Jugg players and bad Jugg players depending on how well they know how to play the game and the effort they put into optimizing builds/strategies for consistency. I find that it is the people who don't play Jugg much who tend to exaggerate how easy it is, which makes them come off as being spiteful or envious and makes me really uncomfortable. If you genuinely wanted to balance the battle modes, that's okay, but then you'd have to also say thing or two about 2v2 being horrible. If you don't and all you play is 1v1, that makes you a hypocrite in my book.