I don't see much point on upgrading a MSX2 to 2+ besides for horizontal scroll. "Photo display screen mode" (SCREEN 11 and 12) is kind of pointless as it's bitmapped and slow.
Actually the V9938 had more features than the V9958. But indeed they went kind of unused so ASCII thought of removing them to add the "photo mode" and the horizontal scroll...
About the horizontal scroll, that's a feature the VDP chip should had since the first version (V9938).
One last thing I can think of is worth having is the wait signaling built into the V9958 VDP chip. 
But I'm biased, because I've been using the V9938 built in composite video output to simplify my video design... lol
The video quality isn't so terrible for the cost of a single transistor and a couple of resistors ... ;)
Horizontal scroll though… I think if the V9938 had it, it would’ve done wonders for the games!
p.s. Why anyone would use composite in stead of RGB, I don’t understand .
Horizontal scroll though… I think if the V9938 had it, it would’ve done wonders for the games!
p.s. Why anyone would use composite in stead of RGB, I don’t understand .
Because this ain't Europe and there's no TV sets with RGB (even today).
That sucks! The image quality is so much better!
Yah ! A common trend here now is people look for VGA capable LCD panels which accept 15khz RGB. That's the closest of MSX nirvana video quality one can achieve (relatively easy) in Brazil. 
