That's barely a day in each country. Why the speedrun?
I doubt one can see the real gems this way. I travelled a lot, but the highlights were never the famous tourist spots and I would not have felt them as highlight by just stopping by and making a picture. But each to his own I guess.
I once met a Japanese guy who was "doing" Scandinavia in a single weekend, which basically meant flying into Copenhagen, taking a train to Oslo, another to Stockholm and flying out. I don't think he ever saw a fjord or an island.
About 6 hours a day of driving, total visited about 45 out of 52 planned points. For example I don't understand people who go to a beach and spend half a day there, I go, swim for 30 minutes, and I'm out. Same for any other attraction. How long should I spend on a beautiful viewpoint in Greek mountains? For me it's a stop, take photo, admire for 3 minutes, and be on my way. I avoid museums, except transport/communication/computer museums, as they are pretty boring.
I will do exceptions for stuff like Louvre, but sometimes I will just say no to even biggest attractions, like I did earlier this year looking at Stonehenge, +30 minutes of walking and I think +1 hour of driving from my route just to see bunch of rocks - yeah, not for me.
I will go back though, if I found the country particularly nice/pleasing, like I've been to Sweden/Norway/Finland on 2-week road trips two times in summer and two times in winter, and planning another winter one - there is just something about sleeping in car in -15°C (5F) that's just amazing.
> For example I don't understand people who go to a beach and spend half a day there
I think beach days may be similar to your "something about sleeping in a car in -15°C (5F) that's just amazing". Some people really enjoy the sound of the ocean, the warm air, and the occasional dip. There's also just the social aspect of being outside with your family or friends and feeling that heat.
Since Moldova is in balkans, the food is something unique: there is "zeama", there is "soleanca" and the list can continue. These are foods that you don't find anywhere so quickly.
Also: Moldova has one of the biggest wine cellars from Europe(Milestii Mici). And also: the wine is something you MUST try.