I haven't looked at the new tile yet. I'll check it out later today, but my thoughts on the consistency vs. variety issue with the new minaret:
1. I'm not against variety, but one of the things that makes +oriental (and +africa as well) distinct is that they reflect a very rural, undeveloped setting. One of the main characteristics of these settings is that buildings are made from local materials and tend to exhibit a very particular cultural style. That's why variety in +oriental might stand out more than variety in other RMAs.
2. I'm not really opposed to the style at all. But from the screenshot it's not quite clear to me what the construction is. If you just changed the construction of the walls to a more yellowish stone that reflects local materials, that would probably help it blend a lot better. The actual construction (angled roof, wooden roof, windows with shades, etc.) is actually very nice and fits in well.
3. Either way I'm happy leaving the decision in your hands, especially if you're willing to build more structures for the RMA.