I don't think complaining about the graphics/smoothness of SD-Snatcher does it right.
MSX games have always been about playability, and SD-Snatcher scores really high in that department.
Eyecandy is just an extra, and IMO a game should never be judged by it. This is what sucks about modern console/PC games. If it doesn't look stunning, it isn't worth shit to reviewers, while the crappiest games with nice visuals get high ratings... It just sucks.
We've been very forgiving regarding the quality of MSX games when there just wasn't anything better but face it, I don't think asking for smooth animation is too "fancy", and yes sometime it adds to the gameplay. I mean you can't call those RPG where you move by 8x8 blocks very user friendly, you can be 16 pixels away from an enemy and at the next frame there's a collision with it... Duh!
It's even worse when it comes to action games. I remember Road Fighter used to give me major headache because of the blocky scrolling and I never really enjoyed F1 Spirit either, again moves were too "blocky". I'm not asking for anything fancy here, but I prefer when things move smoothly rather than by "blocks", and it's not a major technical achievement. Ever tried YS1 on the SMS ? Same storyline, same GFX, same music, as on MSX but smooth moves. MUCH more pleasant to play 
Now I don't really care about 3D or special FX but good game control should be essential, and MSX can easily handle it.
Well, to me blocky scrolling isn't that bad a thing, but if it can be done smoothly, it should be! However, I'd rather see a couple of new blocky-scrolling MSX games than those games not to be released just because the coder can't get things smooth enough.
Ys 2 is THE main example on how blocky-scrolls should be... it scrolls so fast it looks like it scrolls by pixel in stead of 8x8
blocky scrolls (tm) .... they're good for you! 
Ro: Well that's what happening with Nemesis isn't it ?
As I said, for RPG I guess it's ok but when it comes to game control in general, I'd rather skip the scrolling part (if it's going to look bad anyway it doesn't add anything to the game) and have smooth movements. But hey, it's just a personal opinion.
For RPG I'd do:
1- Smooth Moves - Smooth Scroll (if possible)
2- Smooth Moves - No Scroll
3- Blocky Moves - Blocky Scroll
4- Blocky Moves - Blocky Scroll (for the lazy ones
For other action games:
1- Smooth Moves - Smooth Scroll (if possible)
2- Smooth Moves - No Scroll
3- Don't even bother
4- Blocky Moves - Blocky Scroll (for the lazy ones
Oops, that should be
4- Blocky Moves - No Scroll (for the lazy ones )
I'll go for option 3 in the action games section 