I think the problem is that your not thinking about it right. On the first strike mission on old earth my group was holed up in a hallway for an hour and a half fending off Fallen Captains while trying to take the Walker out.
The first moon story mission was fast paced and quite interesting, considering the main way to survive was hijacking a pike and using it against the ambush force of Fallen. Then there's the Hive boss fight, haven't even beaten it yet.
And I haven't even been to the crucible yet 
For those of you wondering I'm committing to becoming a proficient Sunsinger, no one seems to be using that subclass so I'm going for it (also my name... Yeah) |
Strikes have nothing aside from dodge, shoot, and kill adds, then kill the boss with insane amount of health. Stories, less so.
The only place that has any actual required mechanic, are solely in the raid that's out.