It's just that, if having lie-flat seats is important to you on long segments, you won't find them on a United 737.

Are you able to plan multiple trips to/from the Philippines in advance? If so, and if you can find a cheap one-way to the Philippines, you might find that a CEB/DVO-CLE roundtrip will cost less than a CLE-CEB/DVO roundtrip. 😉 And by the way, QR serves both CEB and DVO.

(In 2022, a friend got CEB-DOH-JFK one way in Business for ~ $2,100 through QR. By crediting that two-segment one-way to Iberia, he got oneworld Ruby status, which is good for free checked baggage and Main Cabin Extra (extra-leg-room) seats when traveling on AA in Economy. This demonstrates the importance of carefully considering where to credit your flights.)