Can't be. I started playing in January and I played for a LONG time with him and now after completing all 200-waves banners, he is still my favourite Sentinel.
These threads are interesting as they provide insight at what we previously thought. Now we know to always take warp for debuffs. Or at least I always take warp for debuffs.
Take tech Armor for whichever level 4 you prefer, and power damage. Take Warp for armor weakening. Have overload do its thing. Max passives for weapon damage. Take fitness to 3. Throw Warp as a debuffer, with your gun doing most of the heavy lifting.