DLR is our go to place in the summer. Weather is amazing...hot, no humidity, no rain.
The last 2 summers, we stayed at Grand Californian. You really can't beat the convenience as it is basically located inside one of the 2 parks. Even if you don't stay on-site, there are so many off-site places that are located minutes from the park by foot. In fact, many are closer than the other 2 on-site Disney resorts. You can't beat the convenience of DLR. You never have to take a car, tram, boat or monorail if you stay close by, and hopping from one park to the other literally takes under a minute.
You don't have to plan every second of your trip 6 months in advance! Planning for WDW can be exhausting. Our last DLR trip, I only booked two things in advance; Oga's Cantina (to make sure I would get into SW:GE), and Blue Bayou Fantasmic Dinner. That's it.
MaxPass blows FP+ out of the water. When we want to do rides, we go to DLR. You can do every ride multiple times, in one day. Try to do that with Flight of Passage or 7DMT at WDW...just not possible most of the time.
Cons: Downtown Disney is tiny, if you care about that. Less dining options. Fireworks and other entertainment doesn't run every day, depending on the time of year. Fireworks are also more likely to be cancelled due to wind. Wi-fi is terrible.