Whether Aruba counts might depend on whether it offers BE service or just international business. Read the find print carefully; what DL considers "international" depends on the purpose and doesn't necessarily agree with what wwe would call international.

Yes, the 25,000 are bonus (spendable) miles only, not MQMs. The MQMs you get for this exercise are double the actual MQMs, where 500 is doubled for short flights. As I pointed out above, an I (deep discount BE) or A (discount A) or higher fare results in 50,000 bonus miles RT instead of 25,000, but these are NOT MQMs. You need a longer trip to get the MQMs you need.