This is all theoretics by myself and the community for why patching particle glitches have occurred, this may entirely be wrong but the theory behind why this is change is coming is as follows from what I understand:
It’s been theorized that the reason that particle glitching is being fixed is not for player experience and bug avoidance, but rather because of certain elements of freelancer that make it an exploit that will undermine profits. More particularly, because of certain safehouse unlocks.
In the CTT there were certain unlocks with a [premium] tag on them, it’s believed that these unlocks will be provided for players that either:
a. Have the deluxe edition / upgrade or some other measure
Or
B. Purchase some separate yet to be announced future DLC for freelancer
Now some of these unlocks aren’t for selectable items that are chosen in the menu, but rather for unique areas that are subsequently changed or unlocked to provide new items, one such example being the broken down church, where behind a barrier lies a broadsword.
With particle glitches, it will likely be possible (or at least has been assumed to be possible by IO) to be able go past these barriers WITHOUT purchasing that premium upgrade and get the items that act as incentive for this upgrade, thus there will be people who choose not to buy the upgrade because they can get some of the items without having to pay for it and simply by exploiting the game.
Sure, on PC this could be considered irrelevant because players could also just simply use console commands or cheats to get what they want anyways (or even piracy I’m guessing, which I will state is immoral, illegal, risky, and you shouldn’t do), but on consoles particle glitches would be the ONLY currently known way to get this content without paying.
I don’t think IO is trying to harm speedrunning with this patch, they clearly acknowledge and enjoy speedrunning as a notable part of their community and the franchise, and have even somewhat endorsed and encouraged speedrunning methods with the trilogy’s rating system, leaderboards, and certain complications for contracts and escalations. But rather it may be that this particular speedrunning tech has problematic implications for other sections of the game that might impact the studio financially (even if in a relatively small or convoluted way).
And sure this may make certain leaderboard times now impossible to beat, however maybe with the changes to how the trilogy will be sold as one singular unit as the “World of Assassination”, maybe there might be a leaderboard wipe or something similar to compensate for these changes in some way