Thanks to Powerhound_2000 I found my posts on powercreep (which would be a pretty great name for a villain... just saying).
> I did some testing!
20 four-hero games vs Advanced Baron Blade in Insula Primalis, 10 games with just heroes from the base set and then 10 games with OblivAeon & Mini-Expansion heroes (no variants for either set).
On average they both took 5 turns to win.
The Base heroes did a tiny bit more damage than the OblivAeon heroes, but you would expect them to do roughly the same damage if pitted against the same deck again and again.
The OblivAeon heroes played roughly 100 more cards than the base heroes, and drew about 100 more cards too (311/210 and 300/198 respectively).
The OblivAeon heroes handed out almost 3 times as many powers to their friends (71/24).
Base heroes lost 2 games, OblivAeon heroes lost 1.
Counting losses as 4 heroes at 0HP the base heroes lost 9 members of their team over the 10 games and the OblivAeon heroes lost 6 heroes but the base heroes generally ended on higher HP when they won.
What does this mean?
Well, it appears to me that the OblivAeon heroes are doing more things, but the things they are doing are not more effective than the smaller number of things the base heroes are doing. It would appear the OP-ness is all in the mind (or I'm misinterpreting the data or the sample size is too small to draw any conclusions).
Google Doc with raw data if you want to see actual numbers.
Someone asked why I used this particular set up
> I wanted to compare a "pure" base set untainted by possible power creep from other expansions. The specifics choices were because Insula doesn't stop any action (draw, power etc) and Blade doesn't destroy your stuff so it's a pretty "friendly" combination for heroes to get set up. Blade still provides a time crunch on his front and a guaranteed DR on his back so you have to deal with both.
And that same someone suggested more testing against The Dreamer, Miss Information and Omnitron.
> The Dreamer (Standard) in Insula Primalis
Google Doc
I remember why I don't play The Dreamer much. Brutal openings and having to manage when to destroy targets so you don't lose your best stuff is brain draining when you're not trying to track everything too!
Both teams won more games than they lost, but the base heroes won more games overall and sacrificed themselves more often to accomplish it, guess that's why they're stalwalt heroes and the other lot are reforming villains.
More cycling of decks, more power granted and more cards played by the OblivAeon lot, but less damage overall (destruction of targets via e.g. Sucker Punch was counted as damage equal to the HP of the projection), so a similar lot of data to the first set.
When OblivAeon heroes did win, they were, on average, faster at it then base heroes. I don't know if that means that base heroes are more tanky and can survive earlier blitzs or if it means OblivAeon heroes can generate a lot more damage early if they get the right conditions, or both.
The last game however made up for all the pain I suffered playing and recording this match up. Luminary was "Hero" of the match, destroying all neccessary projections on The Dreamer's flip side with 2 Triple Crosses and finishing off with a Terralunar Translocator. Never has smashing a piece of the moon into a little girl been so satisfying.
I thought I did the Miss Information test too, but I can't find a spreadsheet on my HD, if I find it I'll edit this post with more thoughts and a link.