Can you give me one example? Adding sophistications? We have a set bible and for the orthodox and catholic churches a few moew books from early saints. Unlike hinduism christianity is NOT ADAPTABLE. period.
The orthodox church will always pretend to be non adaptable but since the times of Galileo Christianity has changed itself through its proxies.
They say something else inside the Church but outside they claim to be more sync with the world. Like I have said here before, about Hinduism and Sikhism, same is the case with all other religions, that they all are full of contradictions and Hypocrisies.
The phenomenon of Atheism is an example of Church proxies, subtly criticising the Church but going no holds bar against Muslims and Hindus. If today Hindu religious heads start criticising Christianity then it will take them more than two centuries to cause the same damage Christians have already inflicted to Hinduism. Being so outlandish and visible in what they have been saying against us, now they are finding it difficult to be that forthcoming. The phenomenon of Atheism which has trolled many Hindus as well is an example of the bait been eaten and numbers been compromised, when Vedic literature within Hindu clout could have catered the Atheist itch very well of those dick head Hindus; rather better.
BTW the direct example of them improvising are Christian Yoga, Christian Bharatnatyam, Concept of Karma, further go and see their channels and see how similar they are now talking like their Hindu or Buddhist counterparts on spirituality, meditation etc.