Time out. The OHP may have been successful (depends on how you measure success)...
The difference with OHP was that it was actually a multi-mission ship. While it had less capability to perform AAW, ASW, SUW, than a DDG/CG, the OHP, as originally built, could very effectively hunt subs, while engaging surface units (albeit at limited range), and defending itself against a fairly high-end AAW raid (for its day).
Multi-mission: the sensors, weapons, and people, to fight in multiple warfare areas simultaneously. That is why LCS, as originally fragged, isn't close to a real FFG.
The modularity, however, was supposed to make LCS better than an FFG in that a COCOM could tailor its capability to best fit what was needed at any given time/place; and, on paper, it would be able to do ASW better than a DDG, SUW better than/as well as a DDG, or MIW better than/as well as an MCM.
Fast forward a few years and the mission packages (especially ASW and MIW) have experienced some challenges and delays; that, intersected with the "distributed lethality" wave, and leadership has decided to retrofit some multi-mission capability: namely, they will all get a pack of over-the-horizon ASCMs (permanently installed), some defensive and offensive upgrades to existing systems, and the TYCOM is taking another look at what manning should look like (read: do they need more of it).