I just got through replacing ALL my interior bulbs with LED's and I have plenty of light. No I must admit, when I pulled my old wedge style OEM bulbs it took quite awhile before I could figure out what equivalent LED's would work with the same brightness. For the most part I matched them well but during my research I did discover that their are MANY varieties of LED's. So your friend maybe have just chosen a insufficient LED bulb. I don't think you need to go through all the hassle of replacing the fixture unless you just don't like it. Get big enough lumens for your LED's and you should be OK.
But like you said, if your fixtures face up, therefore reflecting light off the ceiling if I understand you right) then what I did may not work. Thought I 'd put my 2cents anyway for others.
Husband & Wife TEAM - Houston, TX
2012 Winnebago Vista 35F, Nearly 36', Ford Chassis V-10, 50amp, stored inclosed