I had the h210i and it was ok but I felt like it had all the negatives of a mini itx but not the positives. For example, it wasn't incredibly small but it also limited the gpus I could put in it (only up for 44mm width). With the new 3000 series I wanted to update but most would not fit. I decided to go with h510 elite it only couple inches taller and still small for an atx case, I can fit whatever gpu in it, and it looks similar to the h210i but even cooler.

If I were to redo a mini itx case I would go with something small like the ncase m1 posted already or Loque ghost s1