Not for Blackheart's Bonus Stage becoming a permanent stage of DI. This goes back to DI usefulness for farming event drops, and depending on how funded a player is, Blackheart's stage might not be doable, or too time consuming. If it becomes a permanent stage in addition to the others, players unable to complete this stage would miss out on the other 2 bonus stages which are great for EXP for those using it to level, or additional event drops. Unsure how to counter this issue for HQDIPQ gloves, besides perhaps suggesting that the pieces be added as a possibility in all DIPQ boxes.
Perhaps I wasn't clear in how this should be done, but Blackheart stage would come after the horde bonus stages, so you can do the horde stage for exp/drops and then leave afterwards if Blackheart is trouble for the player, making it completely optional.
I've been thinking this for a while but Dimensional Invasion could use a few improvements. First, I believe monsters inside should drop meso, much like they do in Commerci voyages. Secondly, monsters inside should continue to scale with your level, also like Commerci, instead of hard capping at 180. Third, monsters inside should count towards quests that require you to kill monsters within your level range, once again, like Commerci does. And fourth, the bonus stage should be one of the two hording stages followed by the Blackheart stage, instead of one of the three. The glove pieces that can be obtained from Blackheart's bonus stage box can take weeks or even months to get enough for just one glove since we have basically a 33% chance of getting Blackheart's stage, and then probably like a 10% chance to get a glove piece from the box. Take into consideration that there are 4 different pieces of the glove to get before you can even claim the glove as well.
Also I know I don't give a good presentation like some people do, but if anyone here wants to help out with that, it'd be appreciated, and maybe have a higher chance of being implemented at some point.