hawkeyefan
Legend
It used to be that you could open the cover and play right out of the book. Those days are over it seems. Hasbro is a toy company that caters to kids, that's what we have. They assume that DM will be like me and basically use the MM as a guideline and spice it up. The use of legendary and lair actions must be increased by the DM to balance stuff out, as is various mundane stuff to spice encounters up.
I don't think that's the case. I do believe that the game can be played right out of the book. Certainly that is the case with new players or more casual players. For those of us who have been playing each iteration of the game across a few decades? Yeah...there may be a level of system mastery that has to be taken into consideration. The question seems to be whose job is it to take that into consideration...the designers of the game or the experienced players/DMs.
The complaint is "how does a SINGLE marilith live up to the grand description" and the sad answer is her stat block sadly does not even come close.
That's actually not an answer. It's just a complaint.
The possible answers would seem to be either we as players adjust the monsters or the game mechanics that we have issues with (such as making repelling blast only work on creatures of large size or smaller, etc.) or waiting for WotC to make such adjustments.