Hi pianistimo,
The autograph manuscript is in the National Library in Warsaw, Poland. The original Breitkoph & Hartel Edition and C. F. Peters Edition were considered to be quite faithful to the manuscript. But Chopin often changed his mind about certain details, so it would be difficult to consider any edition to be definitive, as we know from Klindworth's and Mikuli's commentaries. (Chopin probably drove his publishers nuts.)
Here's the deal on the pedaling: The triplets in the LH starting on the downbeats of every measure are extended upward by the RH figuration. When played up to tempo, the pianist gets the sensation that the two hands are almost executing rolls. The RH plays the end of the roll on the double notes of the second beat. So think of the bass triplet rolling up toward that second beat, the RH double notes being the "objective". (Only the tops of those double notes are voiced.)
Importantantly, the first note of each triplet creates either a tonal or harmonic quasi pedal point (for lack of another term) for each measure. So it is imperative that the pedal "catch" that first LH note each and every time! If you miss one, it will sound clipped. Holding the pedal through each measure as Chopin indicates is fine, since the notes within any measure are harmonic. The last note played by the RH is sometimes not harmonic, but it matters not. The reason is that you are lifting your wrist off those notes anticipating the 16th rest that the RH "plays" on the next downbeat--so those particular notes tend to be soft and deemphasized anyway. So this is not a situation where the pedal will create a mud flow.
Incidentally, some of those bass notes on the downbeats are scalar. For example in measures 4, 5, 6, and 7, the starting bass note progresses thusly: E, F, F# and G. Starting again at measure 16, another example, you have G, A, B, C, D, E. The listener needs to hear those scales. Catching them securely in the pedal will ensure they don't get lost. Note the the RH has it own scales as well, as in measures 11 and 12, that is, G, A, B, C which then voice leads to the C# in 13. You probably already picked up on that.
In the stretto section, one has to add energy to push on through in order to intensify the sense of agitation and excitement, climaxing at the ff--which brings us back to tempo again. That is, if you're not aleady up to intended tempo, there won't be much excitement.
On you question on dotted notes: Notice that in the first measure, the G taken by the RH thumb is indeed dotted. Look closely--it's double-stemmed in the dual role of a 16th (the up stem) AND and an 8th (the down stem) note. So the up stem associates it rhythmically with the following 16th note C and melodically leads to that note. The down stem leads it to the A played by the RH thumb, which with the top A above it played with the 5th finger, forms an octave. So as an 8th, it is functioning to extend time duration, meaning that you need to hold that dotted 8th for FULL VALUE to carry its sound through the RH double notes on the second beat, thereby taking on yet another function, a harmonic function in that instant.
I hope I answered your questions. Sorry for the long explanation. Once I start talking about a score, I can't help myself.
