We don't know if such a strategy works. I mean, we can all disarm the main beam cannons of a Ravana, we can fire some Stilettos and make an Orion a sitting duck, but we know that these warships are supposed to be defended by escort fighters. An ideal Blitzkrieg mission will make FS2 crash, since too many ships(over 100)will be involved.
Unlike the original Blitzkrieg, there's no apparent frontline, so virtually you can raid a convoy or a battle group and be chased down by fighters jumped behind you. Great distances mean that there's a need of advanced sensor arrays. Many ships need a few minutes before they can recharge their jump drives, but their signals need more time to reach the sensor of their opponents. In fact, in FS2 there's a continous relying on scout wings since they can jump at a location, check immediately if there's something nearby, then inform Command. There can't be a Blitzkrieg...ships can escape easily. They don't sit and wait.
As for the ground battle thing, there already is a thread about this subject...
We don't know how FS ground battles are, but they must be pretty common... habitable planets may be full of installations, troops and supplies so the tactic "We have secured the system and only this planet is left. Surrender!" may not always work. Conquering a planet is an important objective to achieve during a war(except for a war with the Shivans) and it has inspired many missions by me. It's mentioned just one time in FS2(Mission 1 success debriefing) and is almost completely ignored in custom campaigns.
I think that the GTVA has developed beam cannons for ground units as well...FS2 era ground battles are completely different from FS1 era ones...
Shiv's creating many interesting effects and models for planet surface missions...we now need a Gravity option that works and we'll be fine!!!