coughs so you've read the Dev blog then points to Hisec 113% efficiency stats

And I thought I was on shaky ground..

Did you miss where ore compression is getting a massive boost to compensate for the loss of scrapmetal processing?

A while ago I mentioned that some people would feel uncomfortable if they couldn't ever get their number to 100%. My suggestion is to realize that there is a max player skill at max efficiency station and that is essentially 100%. Rate yourself against that and forget the silly game mechanics where all the asteroids suddenly have more tritanium.

An increase in volume (m3) would be an interesting addition since it would localize production of some items or force an additional cost in transportation. In the past CCP reduced transportation costs with jump freighters and the like. Increasing volume requires an increase in transportation which requires increased costs. Increased transportation costs encourages local production in null as well as high sec. We will have to see what CCP wants to do with this opportunity.

The question is 100% of what? A percent alone does not tell the story. For example the new cap for efficiency is 86.9%.

Lets go through the steps:

1) CCP magically adds 38.1% more minerals to all ores.
2) Your old efficiency in high sec was 100% of the minerals in the ore, but now the ore has more minerals.
3) Your new efficiency in high sec is 72.4%* of the minerals in the ore, but no one can get more than 86.9%. Your new efficiency gives you the same number of minerals.
4) OH MY THERE ARE MINERALS LEFT IN THE ORE!!!! - Those minerals were not there before. So if you compare the number of minerals received from old method vs new method then you could have a percentage above 100%. This means CCP is buffing the minerals obtained from ore, but we already know that because in step one CCP magically added more minerals.
* The caveat is that you need to have maxed skills. If you skimped because you were "good enough," well times change and you aren't.

Exactly. You have several months before the change goes into effect, during which you can clear out your inventory. Update your buying price to reflect the new mineral content of the modules after the change. It will take a while for prices to adjust, but once they have you can resume business as usual.

If anything this is a long-term boost to those who specialize in this business model because the barrier of entry has increased from Scrapmetal Processing 4 to Scrapmetal Processing 5.

What makes you think that CCP didn't want to nerf compression? That would make a lot more sense to me seeing as CCP are trying to encourage industry to be conducted in null sec, including mining.

It doesn't mention in the blog that CCP want to keep compression ratios exactly the same as they are now. I don't think CCP has made a mistake here, this is working as intended, and a very good change in my opinion.

If they just targeted the current compression modules for a nerf, we'd just run a script and find the new hotness. It'd be an endless cycle of retaliation until everything in eve is significantly larger than its constituent minerals.

Ripping the bandaid off all at once and saying "reprocessing values for all scrap metal is capped at 55% of its constituent minerals" does the deed in a much more elegant fashion.

Nope it Is not a stupid excuse. CCP have already followed this exact method you suggest to nerf compression ratios before, and if they do it again then module's will just balloon in size for little reason.

It was never intended that modules where meant to be refined in this way for transport, and as soon as CCP figured out what was happening they have taken numerous steps to try and rectify the situation over the years. They have done as you suggest and increased the m3 of module, and they even bought out a brand new ship (rorqual) to try and encourage people to use that instead.

Unless they balloon modules to ridiculous sizes, then they will never fix the problem with mineral compression. With this change though they have finally nailed it once and for all.

You must be trolling. Sorry CCP messed up your spreadsheet, but anyone can see why mineral m3 = module m3 would be a ridiculous situation.