Leave this movie alone
Now I dont quite get why this movie comes in for so much crap, lets face it Wes craven's was pretty dire, so this could only be a massive improvement over that one, and I think it is, like Mutronics guys in monster suits is always just good old fashioned silly fun.
Heather looks mighty fine, Swampy looks sooooo much cooler and well more swampy like, Louis Jourdan's ham acting is of the finest callibre, plus you get really cool title credits (a classic Creedance clearwater revival track over a nice montage of swampthing comic pics) aswell as all this goodness the kids are actually quite funny.
So please give it a go with a very open mind and just enjoy it for what it is , an ever so camp, monster, b-movie.