Falling in love with something the way we WANT it to be usually clouds reality.
We all know we desperately need WR help. Patton is a new guy who has shown just a TINY glimpse of what we need. So, we LOVE him. Good. I hope he becomes all that BUT, we haven't seen anything close to what we need to see to say he will be great, much less even good.
Williams is a small, quick guy who has shown the ability to work in tight spaces but not against big, tall, strong DBs. However, what we usually see of him is trying to get behind a tall DB, or working the sidelines against a DB who is also usually bigger. None of those situations play to his strength.
Now don't jump the gun here but...Williams is more on the pattern of a Wes Welker. Welker is small and quick. Brady/Manning rarely put him in places where he had to compete vertically or on pure speed alone. Instead, he works the close zones, often against LBs or safeties or a CB, where rubs, picks, bunches allow his quickness to work against a bigger, less quick defender. That is Welker's strength, and it is Williams strength as well.
The problem is, Harbaugh has never shown any affinity for that kind of routes, and route runners. Instead he wants big, strong WRs that can block for his preferred power running game, and hopefully, be a good receiver as well. This is where I come completely out of patience with Harbaugh. "Play to the strength of your players, NOT your PREFERENCE as to the type of game style." Right now we have a power run game when they feed Gore out of the I. We do not have ANY receivers, other than Boldin that can out fight a strong DB. So run plays that fit the WRs we have. Whether that is Patton or Williams, neither of them will outrun very many DBs, nor will they out fight them in the air. Run the rubs, picks, screens, bunches that maximize their quickness. Run the short routes over the middle that will not only give the QB a quick, safe option against pressure but will also spread the defense to open up the outside and deep zones for the guys who can compete well on those routes. Williams and Patton can be the first group but not the second. They just don't have that size and skill set, but they can be valuable.
What I see from Harbaugh/Roman is a stubborn, yes, even arrogant attitude much of the time. They chose a guy with a cannon arm that could gun the ball down the field unlike any other over a guy who was extremely effective at using those short zones. So now, when we have some guys who COULD run those short routes effectively, they are not used that way. It looks to me like pure stubbornness. They won't use the short routes because to do that would validate the effectiveness of Alex Smith which runs counter to the move they made to Kaepernick.
What they should be doing is teaching Kaepernick to use those short zones with touch. This would compliment his deep ball ability and make him even more effective when he does throw the deep ball. Instead, in all three of these last 3 games, CK has REPEATEDLY passed up open receivers in short zones in favor of the longer, and yes, less safe pass. Those zones are where both Williams and Patton could be used effectively. I'm hoping but not holding my breath.