You can do the separate OP & ED files, I just found out recently that this things actually exist, rather than doing the OP & ED for each episode you do it just one time and put those files in the same folder as the episodes, and the episodes will auto play those files as long as they are in the same folder. You can also do multiple OP & ED per Arc and let the episodes connect to the relevant ones. Also you save the space in each episode.
This idea was amazing when I found out it exist, you can even rename the files and it would still work, it doesn't rely on filenames, and if someone doesn't like OP & ED they can just delete those files and the episode will play normally without OP & ED.
So much this.
Dropping openings completely would be such a waste.
I like the animation in those, at least in most of them.
You could skip the karaoke though because it has no real value other than please the weebs and it adds additional work for you.
I, for example, sometimes like to play the episodes with the openings a few times because it's easy to miss little things put in those when you watch it only once and not to mention that those change over time when something major happens in the storyline.
There's no purpose for omitting those, it saves people what, 2 clicks or 5 right arrow mashes? Not to mention you can also play it by chapter.