I think the maverick 88 has a crossbolt safety. so you might get a gun with no safety.

No safety what so ever. Not even a drop safety if I'm right.
I've never had my Mossbergs safety accedentally engage.
And I'm tetchy around any gun that has no manual safety anyways...

So "Cruiser Ready" full magazine / empty chamber / hammer down ?

I guess I could live with either of those trigger designs on an autoloader but it seems to me to be a solution without a problem.      Most shotgun triggers are in need of some work to lighten them up as it is but seem to work well as designed.  I think the DAO design might be troublesome from the shouldered firing position vs the arms length position when it is used in a handgun. 

Maybe it could be played like an angry trombone if you hold the trigger.

Why would a trigger blade mounted safety not be a good combination on a repeating shotgun?

Because it would most likely be striker fired then and it wouldn't be safe for appendix carry  .

I wouldn't trust a 12 gauge that I couldn't carry appendix.

Would a repeating shotgun with only trigger blade safety, have the same advantages as a Glock trigger? 

Why or why not?

This is out of my league, but what the heck. To my knowledge, there is not a striker fired shotgun currently. Al though if there was, I see no reason why it wouldn't maintain the same characteristics as a Glock.

This discussion seemed fizzle out quickly with little further discussion, so here are some out of the box thoughts comparing the perceived efficacy of shotgun trigger/safety systems vs handgun trigger/safety systems:

Even proponents of shotgun "cruiser ready", known if handgun circles as "condition 3", (hammer down - empty chamber - loaded magazine), want a safety to engage.

     Note: Under the direction of W.E. Fairbain, the external thumb safety on Shanghai Municipal Police issue 1908 and 1911 pistols were deactivated in accordance with required empty chamber carry.

Mossberg's go at double action shotgun triggers were rejected as a non-solution by the LE and popular market in the 1980s, in spite of the popularity of DA revolvers and double action pistols at that time.

Trigger-blade safeties, as used on most of todays polymer frame pistols, seem to be a non-start for shotgunners who fear unintended discharge from brush or other possible snags entering the trigger guard in the field.  Essentially, shotgunners consider a trigger-blade safety dangerous without some type of complete trigger cover.  Apparently todays handgunners tend to agree.