I don't have any, but haven't heard any reports of this. Think they're pretty much the same as the originals. I've only got a couple of reissues, and they were from the Toys R Us line released in the US/Elsewhere rather than the Japanese Encore line, but the two I have (Hot Rod and Soundwave) don't seem to scrimp on quality.
There are occasionally some minor differences (Soundwave, for example, who uses the remolded Soundblaster tape door, capable of holding 2 cassettes instead of one, and I think Hot Rod uses the retooled Targetmaster Hot Rod mold, and has guns with larger pegs than the original as a result) but I don't think they go out of their way to make these things cheaper than the originals. If anything it's the opposite, with the presentation of the Encores being pretty special.
I know some of those with launching missiles had the missiles lengthened for the Hasbro releases, to make them legal, but again, the Encore line is more of an adult collector themed toyline so they probably got away with keeping short missiles. Heck, Megatron still fired his little pellets, so I'd expect everything that no doubt killed millions of us who had these toys in the 80s to still be intact.
assembling a Neo-G1/TF:TM cast. Please PM if you have (or know of) the following at a reasonable price: Classics or Henkei Prowl, Astrotrain, Ramjet, Skywarp, Sunstreaker, Sideswipe, Blurr, Perceptor, GDO Wheelie and Springer, or 3rd Party Motobot Arcee, FP Springer, iGear Ratchet and Ironhide, City Commander (and/or Ultra Magnus), Starscream (deluxe) Coronation add-on, or Spike and Daniel in their Exo-Suits.