Alright then, I won't beat around the bush, currently, Bahaar's Sanctum is horribly unrewarding for the inherent risk the dungeon poses and the effort needed to clear it.
Before I begin, let me first make clear that I am aware of the upcoming "nerf" to Bahaar in the next patch (which reduces the enraged waves damage) and the chest that gets added after clearing the first phase, which drops Metals, Weights, Limbs and Glove/Boot amplifiers (which further reduce damage taken from certain attacks from Bahaar), but even with that, the loot is far from good enough to make this dungeon worthwhile to run in the long run - basically, I don't see why anyone would continue running Bahaar once they have their gear apart from trying to get good runs for Highwatch E-peen statues...
Let's be clear here for a second, for the time being, Bahaar is restricted to a really small playerbase at this moment - most parties won't even try it. Even if on a perfect run, clear times are similar, if only slightly longer than previous hard mode dungeons, due to the way the dungeon is laid out, it requires consistency over a longer period of time and, in case of a wipe, you can lose up to 80% of the dungeons' progress in one go. This makes the dungeon have an incredibly high risk factor, while having rewards that are, for the most part, underwhelming.
Currently, Bahaar drops up to 7 or 8 (?) Mallets (which are a problem in themself, but there is another thread discussing that), and some Weights, Metals and Limbs, and a bunch of etching boxes (which aren't worth much anymore). Furthermore it drops only 1-2 Diamonds that are rolled between 5 people. This is a problem that other dungeons like GLSH and DRCH have as well. That aside it has random drops (Masks, Amplifiers, Etchings) at a low chance.
As of now, it is hard to get parties for Dreadspire together (especially on more empty servers, namely Killian and Seren), which makes it hard for people to even reach the point at which Bahaar is actually needed, since there is not enough diamond supply, or not enough ways for players to farm them (or they are simply too expensive) to even upgrade to Heroic oath +2.
And that leads me to another problem that comes up with Bahaar: IT DROPS NO ELLEON'S TOKENS. No matter if it is an oversight or intentional, this prevents players from - albeit indirectly - gain any golden or silver Plates from Bahaar, which are NEEDED for the upgrades.
This bad loot just discourages players even further from even trying Bahaar in the first place.
Therefore, I would like to suggest some changes to make this dungeon worthwhile, as with the low chances of upgrading to +3, players will likely have to run it quite a lot, and make no money while doing so. If nothing is done, I could imagine that players will ignore the dungeon as soon as they hit full +3... making it even harder for unluckier people to get runs together.
The first one being, of course, to add Elleon's Tokens - and for the effort required, I believe that 100 of them seem fine enough.
Secondly, there is still the problem with the diamond supply - this is particularly relevant for those who haven't reached HO+2 yet. Of course, if you are full +2, you won't need to run anything but Bahaar anymore - however, what about people who have alts, or those who want to run the dungeon to get any income whatsoever? The dungeon bears such a high risk that this low income that it currently has can easily turn into a loss (due to gold spent on consumables etc.). For this reason, I would suggest at least one diamond, preferably even two (or just make it a chance for two diamonds), for EVERY MEMBER IN THE PARTY. That way, they can choose whether they want to use it to upgrade their items or if they want to sell them.
Gearing alts currently is a major problem in itself, but, once again, this is discussed in another thread as well, albeit indirectly.
If that can't be done, Bahaar still requires some way of income for those select few players that can clear it to supply their enchant costs. So in one way or another, more rewards are needed.
Perhaps this can also be done by making Bahaar drop consumables (Lambs, Superior noctenium, etc.).
In any case, let me hear further suggestions, if you have any.