@Black_Elk:
It might be worth separating the two ideas and pursuing them in isolation. On land I think the blitz concept works as outlined. At sea the idea is more aspirational, we wanted to see if a similar blitz move might be activated by cruisers, but how exactly to work that, I’m not as confident.
In both cases the idea was to provided a special attack that makes blocking/stalling more challenging for the defender. So instead of covering with 1 infantry unit, or 1 dd to stall a massive force, here you’d have to manage the defense with the blitz factored in.
I like it on land with the armor mech and tacs, possibly fighters. Naval blitz, if it could be worked out, would probably look a bit different and might have a separate system.
In Pacific Naval Combat, the usual twin powers can-opener is often made by German’s StratBs against Destroyer blocker.
After it’s done, Japan will move a lot of warships through the empty SZ to get into another SZ for combat.
What is the real difference, if it is Japan which have to use a few of his units to wipe the Destroyer unit, then reach with his main fleet the second SZ?
All that I see is a better coordination of units by Japan but less units available for the main Naval Combat beyond the blocker.
There is still a gain to use 1 or 2 blockers tactics (same as dividing attacking troops amongst 2 combat zones: odds always worse) but blocker tactics is not as strong as OOB when German’s StratBombers are not in Japan.
If you want to keep a similar blocker impact, but not an absolute one, I suggested 2 ways:
first, it should be mandatory to control the first SZ (hence, it is different from the German’s StBs can-opener in which the SZ is uncontrolled).
second, it could be a condition to destroy all blockers in a single combat round, to proceed to a Naval blitz.
So, Japan would need to use more units to be sure to get the hit. And, if not, in some unlucky times, the Destroyer will still block the Naval forces in the first SZ.
Do you see how the attacking forces will be less powerful than under the twin powers can-opener?
So, is their other conditions to think about which can imply Cruiser, so you can have both world?
Thinking out loud:
Cruiser could be the naval unit required to perform such destruction of the blocker (rationalized as doing an advance scouting mission to open the way to the main fleet)?
To perform a Naval Blitz, 1 Cruiser unit must controlled a given SZ in which pass through all the other Naval units.
So, in a sense, Cruiser, same as Tank, is needed to perform the breakthrough. Tank help MechInf to reach the second territory.
Cruiser help the whole fleet to reach the second SZ, but it must stay behind, in the first SZ.
And, for instance, if there is 2 US Destroyers blockers, probably Japan must at least wipe them with 1 Cruiser and other units, such as Subs and Destroyers or even planes.
Of course, the cheaper the better (Subs), and if Japan is unable to gain control of this SZ with her Cruiser unit (for example, all units were destroyed), then it can only move all his Naval unit into this SZ.
In some unlucky cases, such a Naval blitz move would be costlier for Japan than just controlling cautiously the blocked SZ by moving all his Naval Units in the first SZ only.
So, probably blocking with 1 Destroyer and 1 Submarine (14 IPCs) can become an interesting mix (and be much more historically accurate).
Because, the attacker wouldn’t be able to protect the Cruiser (with a few planes) without also bringing a Sub or a Destroyer, in case the the defending Subs get a hit or a surprise strike hit.
What do you think of this?