If you haven't sold the Spark, yet, then reconsider.
I have had the Spark for a year as well, and I own the MP (two actually...one Alpine White...long story short the price was too good to pass up).
I use the Spark to get vid of areas that I would not take the MP. The MP is capable of flying in these areas. That is not the issue. The issue is that the MP freaks people out much more so than does the Spark.
In general, I use the MP for "epic" shots, and the Spark for the nooks and crannies. The Spark can take a beating. Therefore, I can take more chances in the nooks and crannies without freaking out over crashing the MP, and it's delicate gimbal assembly.
I find the Spark to be far more challenging; largely because of it's inability to yaw well. Therefore, I'm 'forced' to consider other types of shots, which, maybe surprisingly, increases my creativity, at least in the thought process.
I'm constantly trying to imagine work arounds for the Spark. For example, I find Tripod mode to be too slow, and the gimbal when in Tripod mode is way too sloooooow. The work around for this is to be in normal GPS mode, then move the stick sensitivity down; thereby decreasing top speed to around 3 or 4 mph. This gives the Tripod like speed for low down shots, and does not affect gimbal speed.
I like to keep things simple, and too much gear is a challenge to manage. So, I'm always thinking of selling the Spark, but I just can't bring myself to do it. Also, I won't get but 25% of my investment returned, and I know, I'll wish I hadn't sold it.
Truth be told, the Spark drives me crazy, but the MP is too easy. The MP
battery life has me flying around for no reason (MP mission already accomplished) just to get to a
battery level optimal for recharging.
If the Spark yawed better, then I would not have the MPs, though I really enjoy flying the MP with the DJI goggles.
Spark battery life is too short for use with the goggles; especially considering Spark in goggles is 720p vs 1080p for MP.
So, as you can see, owning both can drive you crazy.
Still, the pros of owning the Spark are
Simplicity
Rugged construction
Nook and cranny shots
Greater engagement in the videography planning.
People friendly...they really do dismiss it as a toy, and not an invasion of privacy
Charge all three
batteries at once, and all three are done in 45 minutes.
It's not precious, so more chance taking; respectfully, of course.
Good video straight out of the camera. I wish I could get the Spark look from the MP. I've tried. No success to date.
It's much more capable than the 'selfie' drone it is marketed as.
It's not that I could go on and on about it, but still this is a reasonably good list of reasons to continue flying the Spark.