There's a similar thread at
http://miuiandroid.com/community/th...about-miui-rom-that-you-would-like-fixed.5517.
The best thing about MIUI is that Security Guard which lets me control apps, and worse thing is no direct support/feeedback through bug list (or I don't know where it is).
Good thing about MIUI is that it ships some features not found in other ROMs, but bad thing is that there are some small but important things missing for a long time.
So, my wish or bug list for MIUI 3.7.26. on SGS2 i9100:
1. When I receive an SMS, contact name is not shown. It's only shown when I enter the messages after, and even that sometimes, sometimes not... I have 1000+ contacts, 4000+ numbers and 1500+ SMS in phone now, don't know if that's related. Found here also "sms pop-up on the lockscreen doesn't show contact name"
2. Add option to strip diacritic characters from SMS when sending, like in stock ROM. Found here also "I really, really freaing miss in MIUI - in many languages there arediacritic characters and I'd like to see an option of autoremoving them while writing an SMS."
EDIT: it's here at
http://en.miui.com/thread-4734-2-1.html
3. Add snooze alarm option, like in Sense alarm. Found here also "An option to say 'Snooze' or 'Dismiss' on a clock alarm placing the hand over it (using the proximity sensor), like 'Magic Alarm' does".
4. Set SMS and notifications volume *apart* from ringtone volume, like in stock ROM. Found here also.
5. Add 4-way reboot option when long-pressing power button for reboot to recovery or bootloaders, like in custom ROMs such as Omega. Found here also.
6. Please add Auto Lock Screen on/off toggle (now there is Lock Now which is not that important, we get the same with Power button). Add Volumes to Toggles.
7. There are now 11 icons in TOGGLES first screen, plus "More" button. Instead, there should be 5x5 tile, or also 4th row, so that 15 or 19 icons are visible, plus "More".
8. Add M3U playlist and sort by genre support to MIUI Music. I use MixZing now because of this.
9. MIUI Music has lyrics support, which is great. But, I get "Lyrics not found" for most of my songs (I haven't tried all, but I've never had a match). Add an option to change lyrics provider (useful for those outside of China).
10. I wish we had 4 tabs in File Explorer - to add Card to existing Browse, Phone, MiDrive. Under Phone now there are internal storage and SD card, but it's slow to click.
11. Add 5x5 or even more icons on the screen. That's so important to me I use ADW launcher, although I don't mind about app drawer, requests found here.
12. I can find "Encrypt Phone" in Security & Privacy. But, it doesn't seem to offer SD card ENCRYPTION. It should be offered separately from the phone encryption.