So I've opened 8 boxes and here's my feedback.
Box states oversized SP cards are 1 in 5 boxes. Of my 8 boxes I lucked out with no Dupes and 3 SPs - Trout, Acuna Jr, Judge. Base Oversized are numbered OTC-XX and SP are numbered OTCSP-XX These are unprotected "mounted" in the blister box so ZERO chance of perfect corners... and it seems SPs were treated a bit rougher when they were mounted. :-(
Just like with Series 1 Monster you get a standard size "Collectors Box" card loose in box in addition to Oversized Card. Loose card is NOT foilboard and is numbered CTC-XX. Like the series 1 MonsterBox standard card the back of the card has "Collector's Box" inside the homeplate near the card number to help you identify.
Update Packs are standard retail style packs (no orange Halloween themed foils as found in blaster boxes). Insert rates seem more generous than Blaster packs.
Series 1 and 2 packs seem to be STRICTLY filler. I pulled a suspiciously high number of Homerun Challenge cards.... appears they are dumping these here now that season is over. I even pulled a (significantly devalued) "Free ToppsNow" card. The TN redemption expires 12/31 so I bet they were rushing these out while there's some redemption time left.
Flagship packs are fairly neat idea. Of the 24 pack I opened I pulled one (/99 green) parallel (Rizzo). These are nice 50pt (I believe) stock but I've found centering and corner cut crispness a bit lacking.
Its one of the VERY few "good values" to come from Topps lately. I recommend at MSRP, try to avoid those flippers.
As other mentioned I am finding NOTHING online AFA a checklist.