i suggest you read my post thoroughly again. all the answers are there. whatever points you have said matches exactly that of IAF top brass who love the Rafale. also IAF is shamelessly trying to copy the USAF by pretending that the marketing brochure for multi-role fighters is unquestionable law.
CAS is possible only when air superiority has been achieved else it's suicide. i'm not gonna take it up point by point as i feel all your questions can be answered by the original post. and i'm getting a bit tired. sorry man.
i'll just say that the answer lies in the name itself CLOSE AIR SUPPORT. emphasis on CLOSE and SUPPORT.
if you are not going to be tree-top close to the troops for 5-6 hours continuously then better not bother about CAS anyways. call it interdiction then, not CAS at all
. CAS implies moving with the troops and fighting alongside them hand-in-hand. not at 20,000 feet and far ahead of the slow moving ground troops as you think it to be. i see it as a support weapon not spearheading one and a part of combined arms tactics.
btw all modern planes have built in waste disposal systems. they don't have to bother about visiting the loo. they piss sitting in their seats. it's surprising you aren't aware of this.
from what i understand you are mixing up battlefield air interdiction and CAS.
ground attack is divided into diverse roles- strategic/theater bombing, air interdiction further spilt into theater interdiction and battlefield interdiction, suppression of enemy air defenses (SEAD) and CAS. Su-34 or even Tejas for that matter can carry out all the aforementioned roles with full competency except for CAS. as for the loo Su-34 has an in-built toilet and also plenty of area for lying down and catching a wink or two.
alas
it all boils down to our military doctrine and how much we actually value the poor infantry guy's life. considering that Cold Start is still just some fancy thought on paper only and that our official doctrine is defensive offensive till date
i don't see CAS being relevant unless we're the invading army which is impossible for a non-violent country like ours. also in an infantry rich armed forces like ours i don't believe that our generals value every soldier's life that much in their grand scheme of things and feel that they can afford to lose a few thousand extra soldiers. look at the slaughterhouse that they created in Kargil.
i would like to point out that the Russian equivalent to A-10 i.e. Su-25 still doesn't adequately meet all the requirements of CAS. come on, only 250 rounds for the 30mm gattling cannon! however Russians attack choppers are much tougher and have higher firepower than their western counterparts so i think it balances out. as an alternative i think for Indian armed forces a massive fleet of Russian attack choppers upgraded with western avionics would suffice. but they would still lack the range, endurance, armor, firepower and payload of the A-10.
Kargil was different though. Kargil wasn't CAS at all. it was battlefield interdiction which called for precision air strikes. considering the very high altitudes of the targets and the limited space for maneuvering aircrafts a slow moving attack jet would have been suicide hence the Mirage 2000 was brought in.
@smestarz all things considered my point is
since we're a defensive army and only concerned with repelling enemy attacks i think that attack choppers would be sufficient for CAS. if we're planning to invade deep into enemy territory then a dedicated CAS fighter would be necessary.
again as you had mentioned using the blitzkrieg example we could simple bypass the heavily defended fortifications as we did in 1971 war in the eastern Pakistan sector. but present day Pakistan would be a completely different ballgame. it's a myriad labyrinth of tunnel networks, fortifications, anti-tank/aircraft defenses and what not. not to mention the hundreds of terrorist organizations for guerrilla warfare.
MiG-27 though too fast for CAS was still able to fulfill the task upto a certain degree. what happens when it is phased out? there's a reason why the Americans and the Russians are still clinging on to their antiquated but highly effective A-10 and Su-25 respectively. the Su-34 strike fighter can no doubt replace all of Su-24, Su-17/20/22, MiG-23BN & MiG-27 but never the Su-25.