I'm on numerous lists for an LCP. Sights in this class of pistol are basically non-existent for a couple of reasons: 1) it's a gun designed to shoot a target less than 21 feet away, 2) big sights will snag up on a fast retrieval and get you hurt.
It's not a range gun at all. Complaints about sights are indicative of the user's knowledge about the gun's proper use.
Lots of Keltec fans will say the Ruger is no better - and with current production quality issues, they are probably right. Ruger fans will say it's no worse, and Keltec has a track record of excellent customer service - which is pointing the finger right back at the real problem.
Small .380 autos are picky about ammo, and many new owners are not experienced gun geeks. Their expectations are pretty high from buying other merchanise, like electronics. They just don't understand the huge difference. Mechanical devices have break-in periods and may need initial adjustments. But their service life is estimated in decades. Electronics always seem to work great out of the box, until you junk it a few years later for the newest-latest-greatest.
Case in point, HD TV is coming on line. The last equivalent change in firearms was the transition to smokeless powder.
You will be well served in the long run with either pistol if you don't put too much expectation into initial break-in perfection. Chances are the Keltec may give you a slight edge, now, in having less problems, or at least quicker turn-around. But you may be carrying it for the next ten years, so consider the features carefully and decide which pleases you more. That way you will be more inclined to have it on you when you need it, which is what it's all about.
Me, I'm waiting for an LCP, probably #89xxx at this rate. My friendly dealer already knows I expect it for Xmas, which he denies will be that late. I hope he's right!