Stability will an issue with a tripod so light...but if the carrying weight is a more important factor, it can be worked around easily enough.
I have a off-brand carbon-fiber tripod and ballhead that weighs 2.7 pounds...just a touch more than my 2.5 pound (with lens) 4x5 rail view camera. Being tall and 71 years old, bending over that much to focus and compose is unnecessarily uncomfortable... and any slight tug on the darkcloth threatened to move the whole camera/tripod. Trying to use its center column just made it worse. For me, it turned out worthless as a 4x5 tripod -- but a perfect match for my Rolleiflex and its waist-level finder.
When recently buying a tripod to take to Japan to photograph for several weeks with the 4x5, I bought a little heavier tripod (5 lbs w/ ballhead) in exchange for added stability and ease-of-use. No center column, 5-sections, 63" tall (ground to ballhead QR plate), and only 22" long packed down. Worked great -- a little over-kill, capacity-wise, for my light 4x5, but it is perfect for my wood and brass 5x7.
So if the Manfrotto 055 3-section tripod's height (without raising the center column) is sufficient for you I see no issue with it. If at all possible I suggest getting your camera on one before buying one just to see how stable it feels while under the darkcloth and such.