More Lapras is always a good thing. It'll be a pain fighting them in gyms, but it'll help more in fighting against gyms then defending them, as with every Pokemon but Poliwrath. When using Lapras to take down gyms, it'll help a lot against all the Dragonites that plague the higher CP gyms, and also has a positive match-up against Gyarados, Vaporeon and Exeggutor, and Arcanine (despite Arcanine resisting all its attacks sans Dragon Pulse, Lapras still wins thanks to its giant HP). And of course, Lapras taking down gyms should beat a Lapras defending a gym assuming same stats and moves. Plus I rather see Lapras in gyms than Snorlax.
Also I still need Dewgong and Cloyster for my Pokedex, and don't have any of the ice-medals yet (I've hatched 1 Lapras and caught 7 Jynx).
From Serebeii:
Some changes to eggs have been announced for Pokémon GO. From now on, Rattata and Pidgey will never be found in 2km eggs anymore and, in addition to that, Eevee will now be found in 5km eggs rather than 10km eggs. The reasoning behind this change has yet to be announced but we'll keep you aprised on all developments
Very glad that no more Ratata and Pidgey will be in 2km eggs. No one should be sad about this.
Regarding Eevee in 5km eggs, this is probably better too since there they're usually a good hatch - there's also some gain from hatching them because Vaporeon is very useful, even if it's just for the candy. Definitely better than most of the 5km hatches; stands out as one of the best if you've filled in the Pokedex (I'm not there yet, still need Grimer, regionals, and some 5km evolutions / candy). In terms of 10k, helps for getting rarer stuff to fill in the Pokedex and of course the powerful Dratini, Snorlax and Lapras. Though to be fair, many of the 10k hatches like the Hitmons are useless once you've already got them in the Pokedex, and I would rather have Eevee over them. If it means a better chance of getting the stuff I want though, I'll happily accept it.
Now hopefully they'll eventually remove Zubats from eggs too.