The phrase "a weaker alternative to" is correct and usable in written English.
It can be used when comparing two options, indicating that one option is less effective or less strong than the other.
Example: "While the new policy has its merits, it is ultimately a weaker alternative to the previous approach that yielded better results."
Alternatives: "a less effective option than" or "a milder substitute for".
It isn't as over the top as Samsung's infamous TouchWiz, but much of it feels unnecessary with duplicated apps and a weak alternative to Google Now.
To working people, it showed Democratic weakness -- a weak commitment to the change desperately sought by struggling families, and a weak alternative to a Republican philosophy that has held America back.
What would be more interesting, in the long run, if the data generated through Friday served to complement the Iris app, which is still a much weaker alternative to Siri.
The House Republican leadership is pushing for a weaker alternative that allows private companies to continue staffing airport security checkpoints.
One banner read, "If your blood is not boiling now, then your blood is not blood!" The campaign by Mr. Hazare, 74, was intended to force Parliament to consider his anticorruption legislation instead of a weaker alternative put forth by the government.
So again, some had a weak alternative offer to fall back on, while others had no alternative.
And although he has joined the House leaders in supporting a weak alternative, Mr. Bush has been careful not to threaten a veto of the Senate version.
For Gates, a weak best alternative to a negotiated agreement, or BATNA meant that he had strong incentives to appease Affleck.
[H]ealth insurance cooperatives were created as a weak, underfunded alternative to a much stronger option that the Republicans blocked from passage….
When an individual has a strong BATNA going into a negotiation, she is less dependent on the opposing party to reach her needs than she would be if she had a weak alternative or no alternative at all.
