Getting the trailer too high could impact stability. Note that a lift kit does NOT raise the axles higher off the ground. Only larger tires will increase the ground clearance under the axle.
The Michelin LT225/75R16/E LTX M/S2 tires are load rated 2,680 pounds @ 80 psi and are 29.2" in diameter.
The Michelin Michelin LTX (P) 235/75R15 XL tires sidewall load rating is 2,183 pounds @ 50 psi but is derated to 1,985 pounds and has a 28.9" diameter.
The GoodYear Marathon ST215/75R14C tires are load rated 1,870 pounds @ 50 psi and are 26.7" in diameter.
So going from 14" tires to 16" tires, the tire diameter increases 2.5" and raises the axle about 1.25" higher off the ground.
Another factor is that the hitch will be higher and may make the connection to the tow vehicle more challenging. Fortunately there are balls with ½" incremental increases in the shaft length to help get the trailer level.
Doing just the 15" tire and wheel upgrade allows our 23D to be at the same elevation that our 25FB was on the same tires and thus we are able to use the modified straight through Hensley stinger we had in stock.
The SenDel wheel company make both a 14" and 15" wheel that will fit the 14" 5/4.50" bolt circle with zero offset and the same 3.19" center bore so the original stainless steel hub can be used in both wheel sizes. They also make both a 15" and 16" wheel that will fit the 15" 6/5.50" bolt circle with zero offset and the same 4.25" center bore so the original stainless steel hub can be used in both wheel sizes.