In the Winawer white has some other tries too, keeping the game less closed than after 4.e5. For example Hector's favourite 4.Ne2 - which theoretically isn't feared by black, but *every time* I see him play it seems so incredibly easy to beat the french!

For example, play through yesterday's game in the Swedish highest team series, on board 1 against Lyrberg, rated 2577:

http://elitserien.schack.se/elitmalmo/live/rond1/rond1.htm

I've tried it myself in blitz a few times, without much succes, so I suppose it will take some real effort to get to know  the variation as white...

3.Nd2 avoids Winawer (YES!!) but is a bit cramping for white  & a bit slow going & dry  . Also 3...c5 is best reply for black here & gives him more freedom on Q-side than say Winawer. Play against IQP is 'petit jeu'. You are right. 

KIA can give an attack but a bit  slow moving for my liking. Faster paced & sharper  attack is 7.Qg4 line in Winawer or Albin-Chartard-Alekhine attack against 3...Nf6. The main big problem here is you need to face Winawer or face dxe4 which doesnt really simplify as you say, but gives black a more solid but passive setup. 

So if you cannot bring yourself to meet the Winawer (like me) or cannot stand playing against  very solid defenses (Burn & Rubinstein-dxe4 types), you've no other choice but KIA or exchange variation. Depressing isnt it??

But in the exchange variation, even though lacking central tension but white has a freer game compared to KIA where pieces are more closed & bunched together. KIA works as a coiled spring. So timing is needed to free the position & get pieces into action, otherwise white can get suffocated. But waiting for that 'right' moment to free the position is hard if you like quick action type of game. Trying to free at the wrong moment gives black the initiative. Its all a matter of taste. I prefer freedom in this case, even if lacking tension. So i play exchange rather than KIA.

Thanks to All!
I summarise :
Exchange variation is not my cup of tea , since it lacks an essential element :tension in the centre
Now in 3 Nc3 variation , W can't avoid Winawer , that lets Black too much initiative in the centre
Else classical with Alekhine-Chatard would be OK , or even Mc Kutcheon , but how avoid dxe4 , that simplfies too much the game?
Now , after 3 Nd2 Have W real possibilities of attacking  play , or only "petit jeu" against an isolated QP?
I think the other moves , as 3 Qe2 , or 3 d3 , are too slow
Now , if somebody can prove me that W get an attack with KiA I shall say OK

Smyslov,

But if c4 is not enough....then what else is there in the exchange to make it more interesting for white??

Unless you are meaning to play 3.Nc3 (objectively best imo) & face the Winawer [Urks!, (for me anyway)], or 3....Nf6 - Classical, Albin-Chartard, Macutcheon & Rubinstein as possible variations coming from that 1 reply.

Dom et photophore, 

La ligne: 1.e4 e6 2.d4 d5 3.exd5 n'est pas si grande pour un jouer qui aiment Najdorf avec Fg5.

Pour moi, Le Nimzovich (3.e5) ou Le (ou <<la>>?) Classical avec 3.Nc3 est meilleur.  On peut jouer comme les autres qui fait le Fg5 Najdorf.  Je croix que c'est plus en le style des jouers.

(I love to read French, but haven't written it in twenty years and there's nobody around to chat with in French, so please correct my grammar!)

@castlerock: 
This is probably an issue of playing strength: stronger players tend to be more flexible, so the objective merits of moves becomes more important than trying to fit one's own subjective tastes. Consequently, 3. ed5 will prove less of an annoyance to more advanced players, who will certainly be glad to equalise on move 3.  

In any case, the exchange french can lead to sharp opposite castling races, so its not as though its dull in the first place!   
 

3. Nd2 is very agreeable to many 1. e4 players i know and will be my recommendation. 3. Nc3 Nf6 4. Bg5 is even better, though the Winawer is too blocked for some, but even there White has plenty of attack.

Don't believe those who argue for 3. ed5. The exchange leads to an open game but comes at a huge cost of conceding complete equality to Black. Those who say the exchange is a deadly weapon belongs to the same type of people who will argue that the KIA is good because Fischer played it

Either that, or they play the French themselves and can't wait to face more exchange french