The contention is frankly moronic, but gets made all the time by "antis" who demand compromises and then claim that an ordinance that gets amended to address their issues (or, maybe, developer issues) is illegal.
The court held that changes to the terms or regulations in a proposed ordinance, even if they would affect the title (like they pull a section out) don't require re-notice unless the scope of the ordinance changes fundamentally. Like an ordinance that is published as addressing development standards for one zone district suddenly being amended to add new provisions to another district.
BUT what's scary is their language analysis of the provisions for non-zoning ordinances and for ordinances that affect 10 or fewer acres.
For "regular" ordinance, the court implies language in the statute that requires that the notice include reference to where the text of the ordinance may be viewed as meaning that the ordinance text must be adopted as proposed or noticed. I had never heard that an ordinance could not be amended after being noticed and before being adopted - this seems unnecessarily restrictive.
For zoning ordinances affecting 10 or fewer acres, the notice must include the substance of the ordinance as it affects the noticed owners/neighbors. The court interprets this to mean that
This subsection requires compliance with the notice requirements of subsection
(2), described above, and requires that counties mail to each property owner
affected by the proposed ordinance a summary of the proposed ordinance
explaining how the proposed ordinance will affect them.
. . .
Unlike the regular enactment procedure described in subsection (2), however, subsection (4)(b) does not require that drafts of proposed land use ordinances be made available for public review. Also unlike subsection (4)(a), subsection (4)(b) does not require that counties provide notice of the substance of the proposed ordinance or its effect on property owners, and does not require counties to comply with the provisions of subsection (2).
The implication could be that rezoning ordinances for fewer than 10 acres (governed by 4(b)) -- which also would include most rezonings that accompany a small scale plan amendment -- can't be amended without re-noticing. The requirement that drafts be made available for review, and that the affects of a change be stated, should not create a result where the commission cannot respond to the input that is generated by the publication. Just as with the "larger" zoning changes, such a result would be unreasonable and inconsistent with the purpose of the statue -- it implies that if the commission hears issues from neighbors, it can't impose an additional condition without republishing notice and holding a new hearing. Such a result is inconsistent with the purpose of the notice provisions and will only result in them being removed, with neighbors getting less rather than more protection.
The core decision was right - let's hope that the court hasn't created too much collateral damage.